How to Use One-to-One Comparison GEDmatch TUTORIAL Genetic Genealogy

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Күн бұрын

The GEDmatch One-to-One tool helps us to segment data on a specific match. Learn how to use this helpful tool.
⏭️ Watch Next How to use the One to Many Tool on GEDmatch 👉🏼 • How to Use One-to-Many...
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00:00 Introduction
00:35 What is One to One Matching?
02:10 One to Many Beta view
06:25 Single Pixel Resolution
07:59 Centimorgan Threshold and SNP Threshold
09:20 Where would you want to use these tools?
11:54 Don't Use Mismatch Bunching
15:18 Show Fully Matched Regions
16:24 Prevent Hard Breaks
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#Gedmatch #FamilyHistoryFanatics #geneticgenealogy

Пікірлер: 461

@FamilyHistoryFanatics 2 жыл бұрын

⏭ Watch Next How to use the One to Many Tool on GEDmatch 👉🏼 kzfaq.info/get/bejne/esh3eZqTydXZdWQ.html

@christinesearle6057 3 жыл бұрын

Thank God I read these comments! It makes me feel a whole lot better! This video simply does not address what I need to know - simple for simples please!

@FamilyHistoryFanatics 3 жыл бұрын

Thanks for the feedback. GEDmatch and One-to-One tools are very challenging to understand, even when I have simplified the tool. Feel free to join me in a livestream on Friday to ask for more clarification. Or tell me where you get lost so I can resolve that information gap.

@annparisien8722 3 жыл бұрын

I agree Christine

@marianneodell7637 2 жыл бұрын

Ditto! Wish there was a “GEDmatch” for Dummies. Honestly.

@marianneodell7637 2 жыл бұрын

@@FamilyHistoryFanatics Guess I missed that. Is it available now by any chance?

@povertylevelphilanthropy1524 4 жыл бұрын

Do you offer a “for morons” edition? If so, where does one sign up for said version?

@FamilyHistoryFanatics 4 жыл бұрын

Keep watching, we try to cater to all levels so some videos are easier to understand than others.

@povertylevelphilanthropy1524 4 жыл бұрын

Family History Fanatics Thank You! I’m trying to learn as much as possible about my paternal grandfather. I’m pretty sure my dna test excluded the man we were told was my mother’s father. He’s Lebanese and judging by my results, and what I’ve been able to calculate on my own with the results, my grandfather is most likely 90-100% Ashkenazi Jewish. Then again, I’ve got the whole ⬆️ moron ⬆️ thing going on when it comes to this stuff so I could be way off.

@sherrisontag5112 4 жыл бұрын

@@FamilyHistoryFanatics I just want to know how related I am to a specific match and How in the one to one match does it tell if you match the kit or not without looking through a thousand matches,

@FamilyHistoryFanatics 3 жыл бұрын

Pam... I've found GEDmatch not to be the easiset place to start when analyzing DNA. Have you used Ancestry ThruLines (kzfaq.info/get/bejne/nMVnY82YuNKqk4U.html) or MyHeritage Theory of Family Relativity (kzfaq.info/get/bejne/o9allZaDvNmuaGQ.html)? - Devon "The Debbie Downer of DNA" on FHF.

@nicoleheymans135 3 жыл бұрын

@@povertylevelphilanthropy1524 I just saw this today, so I hope you've made some progress in a year. My suggestion is, don't close any doors, don't assume Lebanese and Ashkenazi Jewish are incompatible.

@teresacampbell7383 4 жыл бұрын

Just WOW! No Idea if I even know anything now. Friendly advice, you need to make this much simpler. Or maybe it's me? I was lost.....

@FamilyHistoryFanatics 4 жыл бұрын

I'll see about making a simpler video to explain it better.

@jehouse61 3 жыл бұрын

So I can figure this part out for myself. What I need to know is what does it mean? How do you tell if you're related through your father or your mother? How can you tell how distant a relative this person might be? How do you interpret the data, not how do you pull up the data?

@michellem5600 2 жыл бұрын

This does not address the very basics ie what do snp's etc represent?

@FamilyHistoryFanatics Жыл бұрын

Watch these follow-up videos. Then let me know if I have explained things better. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@jessie9384 Жыл бұрын

@@michellem5600 TOTALLY AGREE .For many people its a total over load -- yet each step is not basic enough -- it might be fine for most-- but for many its real pity as many people cannot use this site ,

@germimapierre827 Жыл бұрын

@@FamilyHistoryFanatics z

@germimapierre827 Жыл бұрын

@@FamilyHistoryFanatics eq

@rayjacob5999 3 жыл бұрын

Great information if I had the slightest clue of what it means regarding establishing relationships.

@allthingsree8025 3 жыл бұрын

How are you kin??

@FamilyHistoryFanatics Жыл бұрын

@tamilane4097 4 жыл бұрын

is there a for dummies version? good lord you lost me 2 minutes in

@FamilyHistoryFanatics 4 жыл бұрын

Tami. Right now, GEDmatch is not an easy tool for 'dummies.' My wife struggles using it and she's not a dummy. Stay tuned though, because with the purchase of GEDmatch by a company that wants to improve the user experience, it could become much easier. It just might take a year or so.

@annparisien8722 3 жыл бұрын

me, too

@janicejames7787 2 жыл бұрын

Me too!!!

@yvonnerowell7696 2 жыл бұрын

It’s crazy you pay for it but cannot use it

@zoprice4096 4 ай бұрын

I’m an Information Tech 32 years. I see why this is free. This is just messy, in order to get folks to go to the pay section… it should just be simple for others to understand. Seriously

@MichiganLatino 3 жыл бұрын

I'm finding that your videos show what the software does, but it's not really telling me WHAT IT MEANS. Do you have a video that explains what I'm seeing in the results and how to interpret it?

@STICKITINYOUREAR 2 жыл бұрын

MichiganLatino- Thank you for putting in a nutshell exactly the same problem I was finding. I was asking myself why can't I understand this ? Thanks to you I realized that this guy is NOT explaining the results he is explaining how Gedmatch works !

@STICKITINYOUREAR 2 жыл бұрын

@@FamilyHistoryFanatics - It's now Nov. 2021, have you a video that explains how to understand my results ? I have NO INTEREST in how Gedmatch gets its results for me ! I just want the results explained !

@FamilyHistoryFanatics 2 жыл бұрын

If you would send specific questions with examples of your confusion, to this link I can release a new video to answer this question. www.familyhistoryfanatics.com/contact

@plr7951 2 жыл бұрын

@@FamilyHistoryFanatics We can see colored line & why they are there. We're asking to understand how those lines can be translated into relationship information: ie: *this section indicates a parental match, siblings match, this section may indicate 1st cousin, or 5th cousin 2x removed, etc.

@FamilyHistoryFanatics 2 жыл бұрын

Additionally, I have a number of follow-up videos including the following: kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html

@laroma1653 3 жыл бұрын

thank you for this video...I have been at this for 4.5 years now and thought your explanation was easy to understand compared to other’s I have seen.

@FamilyHistoryFanatics Жыл бұрын

I'm happy to hear that. I know this video serves some people more than others. Glad to hear positive feedback.

@allendise3651 Жыл бұрын

Thank you so much for posting these tutorials. One issue I haven't seen mentioned is color-blindness. 10 percent of males are colorblind, including me, I absolutely cannot see the difference between the red and green lines. No wonder I was so confused at first. I guess I'll have to rely more so on the numbers. I am new to this, and on first viewing, much goes over my head, but my understanding increases with each new video and "rewatch." Reading through comments and answers helps a lot, too, Thanks, again.

@FamilyHistoryFanatics Жыл бұрын

I had never thought about the color blind problem (not being color blind myself). I'll make a suggestion to GEDMatch about allowing people to alter colors.

@rayveninwonderland5152 3 жыл бұрын

I understood this perfectly. Thank you!

@FamilyHistoryFanatics Жыл бұрын

Glad it helped!

@judyplant2809 3 жыл бұрын

Well I wasn't sure whether I had walked in on the wrong the talk but sticking it out to the end I really felt that I got something from it, certainly a better understanding of how it works. The penny is beginning to drop.

@FamilyHistoryFanatics Жыл бұрын

Yay! To continue learning,watch these follow-up videos. Then let me know if I have explained things better. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@2lynnw Жыл бұрын

Very helpful. I finally know what FIR is and how to apply it.👍🏻

@FamilyHistoryFanatics Жыл бұрын

Yay! Happy to help.

@MuckoMan 4 жыл бұрын

You had me at Centimorgan.

@FamilyHistoryFanatics Жыл бұрын

Aww?

@johnchandler5985 5 жыл бұрын

Very Helpful!

@FamilyHistoryFanatics 4 жыл бұрын

Glad you thought so.

@jordancooper8143 4 жыл бұрын

Thanks so much for these helpful videos. I finally relented and uploaded to Gedmatch after not finding the answers I needed on 23andme or ancestry. I have consulted with numerous genealogist and no one can figure out my tree. I have to admit, I feeling overwhelmed on Gedmatch, but maybe I will finally find the answers. Where would I set my CM limit and other limits if I'm looking for birth parents and siblings? I wish you would do a video on how to find these individuals. You can use my info as a tough to find example! Thank you!

@FamilyHistoryFanatics 2 жыл бұрын

Have you watched my series about researching biosocial relatives? It starts with this video for a total of three. kzfaq.info/get/bejne/l9d0ZdRqmr-Yl40.html While I know you want to know limits, I'm first concerned that you're putting the cart before the horse when trying to find birth parents and siblings.

@Lewis152 3 жыл бұрын

You are a genius.

@FamilyHistoryFanatics Жыл бұрын

Can you tell my wife this?

@bertdeivert1873 4 жыл бұрын

Great help!

@FamilyHistoryFanatics 4 жыл бұрын

Glad you thought so.

@marksegal8211 Жыл бұрын

Great info for beginners,

@FamilyHistoryFanatics Жыл бұрын

Glad you think so!

@sandyd-h9563 2 жыл бұрын

I've watched all your video's and Devon's videos.. I'm still lost at how to figure out how I'm related to all those people that share my DNA. Talking about SNPs and CMs means nothing to me. :(

@STICKITINYOUREAR 2 жыл бұрын

Sandy Hessel- You are NOT alone. This guy does NOT explain your results, he explains HOW Gedmatch got your results !

@FamilyHistoryFanatics 2 жыл бұрын

Yes. I explain how to use the tools. SLS. I also have other videos about DNA research.

@FamilyHistoryFanatics 2 жыл бұрын

I would suggest taking a DNA workshop with myself in the future and/or with Your DNA Guide. It sounds like you might need some more hand holding instructions than what I can offer on YT. That's why those courses are available.

@STICKITINYOUREAR 2 жыл бұрын

@@FamilyHistoryFanatics - Sorry if the truth hurt.

@lorineuenschwander1108 4 жыл бұрын

Thank you

@FamilyHistoryFanatics 4 жыл бұрын

Your welcome.

@celestediaz442 5 жыл бұрын

i don't understand anything. I mean.. ok with the explanation, but what it means?

@SheilaAsh 5 жыл бұрын

Me neither Celeste. I can play around and see what options do what, but what I have not as yet found is any videos which really explain what the steps for DNA analysis are and why to do it. There is a desparate need for examples, for video that begin from This is what you have and what you need to do, then explanations of how to do it. I'm keeping looking. Good luck

@FamilyHistoryFanatics 4 жыл бұрын

What questions are you trying to answer? That's the first step.

@Sashstashreview 4 жыл бұрын

Yeah I don't get it. In Biology I did like calculating X and Y etc but that was 9th grade..lol I don't even know how to do it now. I'm so lost. 😬

@DenverGolfer 4 жыл бұрын

@@FamilyHistoryFanatics I think people are asking for "how do I interpret what the one-to-one is showing me". This video explains that clicking on 'graphics only' will limit the display to graphics only vs. text tables and that's fine. But if I have long blue bars 'significant' bars vs. short blue bars on a chromosome, what does that "mean" to me? What are "full match" vs "half match" base pairs, and what implication does that have as to the relationship of the 2 kits i.e. of the 2 people who want to know if/how they are related? Maybe those are addressed in other basic concepts videos but tying this specific tool to "how do you do dna-based genealogy" more than just at a mechanical/operational level of "set a lower snp threshold in order to lower your snp threshold" would be really helpful.

@mareezy56 4 жыл бұрын

@@FamilyHistoryFanatics for instance, i only have one match that has anything in the X-DNA column. Also, that same person has 90.3 total Cm, which is over twice the next highest match. I have no idea if that is significant. I don't know this person. Is there a chart that tells us approximately what the different numbers might tell us?

@eathealthier4u 3 жыл бұрын

I agree with the Alex Jones; there should be an intro course on this, I've had to just learn as I go, no one really explains in detail...

@FamilyHistoryFanatics 3 жыл бұрын

There are lots of resources on the internet. I teach an intro course every other year or so in Nov-Dec.

@eathealthier4u 3 жыл бұрын

@@FamilyHistoryFanatics gedmatch is much user friendly lately, I love the ability to search on a single area of a chromosome.

@Rollers123a 4 жыл бұрын

I get it. I need to watch more vids. Then I'll get it. I think.

@FamilyHistoryFanatics 4 жыл бұрын

Yes, watch more videos, but also ask questions. That's an integral part of learning. And Andy does his best to respond soon.

@wendyharrison7687 3 жыл бұрын

Thanks for the run-down on the interface. But now I want to learn what the values mean. For instance, what is a "Half Match"? I'm presuming it means that you only match on one side of your family. But a rundown of the next level would be good--is there a video for this?

@FamilyHistoryFanatics 3 жыл бұрын

A full match is when one a chromosome pair you share dna with your match for both your maternal and paternal lines. Your siblings, your children, and your grandchildren would fall into this category. For a half match, on the chromosome pair, you share DNA with your genetic match through either your maternal or paternal line, but not both.

@andyk7967 2 жыл бұрын

All of these numbers are lovely, but is there a feature for those of us without degrees in genetics? I.e. a button that is going to tell me who my closest matches are and how they *might* be related? Putting in a one-to-one comparison is great - but without any indication as to what they might mean, they could be the formulation for glue for all I know!! :(

@FamilyHistoryFanatics Жыл бұрын

GEDmatch and genetic genealogy doesn't necessarily offer easy buttons. Have you watched my two follow-up videos on this topic? 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@TheOrignalCarpe 3 жыл бұрын

Sorry I am totally confused. I think many will come looking for the "Dummies Guide To Whose DNA Matches Mine". e.g. I have a profile for myself and someone else and we want to compare them and I just want an answer 'yes this person shares enough DNA to be related and these are the possibilities of what those relationships could be. I doubt many have the time to obtain a doctorate in reading DNA. Thanks for the video though which I am sure will be amazing to many people.

@FamilyHistoryFanatics Жыл бұрын

If you want that answer, it's best to see how much total shared cMs you have and plug it into the shared cM prediction tool sdnapainter.com/tools/sharedcmv4 If you want to learn more about the One-to-One Tool, check out these follow-up videos 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@DocSmith Жыл бұрын

OK, I seem to have jumped into deep water before learning to swim. So, please point me to a curriculum of videos, starting with DNA 101 which will prepare me for this video eventually. Thanks.

@FamilyHistoryFanatics Жыл бұрын

GEDmatch is for intermediate and advanced genetic genealogy users. I have a series of videos for the more beginner genetic genealogist. kzfaq.info/sun/PLcVx-GSCjcdmsw25mbI-wJin_9_9QQUzI But also, make sure you have covered the basics of genealogy research as well. You need to do both to build a family tree with DNA evidence. kzfaq.info/get/bejne/fN5ih8mXkriRqX0.html

@Robert-xd5ue 4 жыл бұрын

Great video..very helpful ...THANKS!

@FamilyHistoryFanatics 4 жыл бұрын

Glad to help

@davidcrompton8896 4 жыл бұрын

I agree. My problem is that anybody related to me has never heard of Gedmatch and has not uploaded their raw data, so I cannot get a match. Should I ask them to let me have their raw data and upload it myself?

@carolynatkinson5456 Жыл бұрын

@@davidcrompton8896 I just have myself on gedmatch, and recently, I have been asked by several persons if my husband was on gedmatch or if I could put him on because of his BOITNOTT line. People are researching it and are coming up matching with him. His g grandmother was a Boitnott, and I have the line back to 1814. His line is long lived except for his g grandfather who died young. They all lived into their 90's, so they went back pretty far easily. I put him on gedmatch.

@natachacohen7782 4 жыл бұрын

I did that one as well... Largest segment = 4.6 cM Total segments = 16.6 cM (8.472 Pct) 4 shared segments found for this comparison. 9771 SNPs used for this comparison. Comparison took 0.018 seconds. CPU time used: 0.004 cpu seconds.

@FamilyHistoryFanatics Жыл бұрын

Thanks for sharing

@amypalmer666 4 жыл бұрын

can you help me understand all this n lay terms....trying to find family roots

@FamilyHistoryFanatics 3 жыл бұрын

If you're a beginner. Start by using Ancestry ThruLines, not GEDmatch. GEDmatch is for more experienced genetic genealogists. kzfaq.info/get/bejne/nMVnY82YuNKqk4U.html

@totopcat 4 жыл бұрын

Not about this specific video but would appreciate all to have date they were added to utube. The various tools etc that you analyse do change. Would like to be alert so that don’t waste time on non-outdated

@FamilyHistoryFanatics 4 жыл бұрын

Each video does have a date added to KZfaq on them.

@barbbiggs 4 жыл бұрын

Hello, thank you so much for your great videos! I tried what you said and it's very strange because the kit that gedmatch said I'm closest to, when I put it in the one on one match it says the kit can't be found. How did it find it to give me the kit number, but then can't do a one on one comparison?

@edm6980 4 жыл бұрын

Hi Barbara Biggs, I don't know for definite, but is it possible that the person who originally submitted their DNA sample has since deleted it from Gedmatch?

@FamilyHistoryFanatics Жыл бұрын

You might check if you have an extra space when you entered the kit (or just click on the largest cM link from the One-to-Many

@theTideswellman 3 жыл бұрын

It would be more helpful to us laymen if this video said...press the button...it does its stuff...and spits out the match at the bottom...here's what the match data means... 100% = sibling. 50% = half sibling . 25%= cousin. or something to that effect

@FamilyHistoryFanatics Жыл бұрын

Watch these follow-up videos. Then let me know if I haven't things better. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@pam.h4007 2 жыл бұрын

Andy, Which companies use which build? As a novice, what I took away was that I should try clicking the prevent hard match box and try looking at complete shared match feature for some members of my family I will leave everything else at the default settings until I become more expert. Thanks for this video

@FamilyHistoryFanatics 2 жыл бұрын

I have tested with all of them and they're all in GEDmatch. With that luxury, I play with all of them. This is why my wife calls me a genealogy neard. As for the rest, you took away the right principles.

@bobbrown3635 2 жыл бұрын

You mentioned using a spreadsheet for comparing data. Please provide a tutorial on how to set it up and obtain meaningful results.

@FamilyHistoryFanatics Жыл бұрын

Watch more of our videos, I use spreadsheets throughout and even link to several templates that I use. We did a Channel Member video about Spreadsheets available here kzfaq.info/get/bejne/lbR3l859ud2-j30.html

@natachacohen7782 4 жыл бұрын

Are we related? Largest segment = 7.1 cM Total Half-Match segments (HIR) = 7.1 cM (0.199 Pct) Estimated number of generations to MRCA = 7.5 1 shared segments found for this comparison. 480168 SNPs used for this comparison. 69.613 Pct SNPs are full identical Comparison took 0.243 seconds. CPU time used: 0.042 cpu seconds.

@viniciuskarimov3516 4 жыл бұрын

Doubt here: lowing your SNPs at Size Mismatching (but not the cM) makes your "new" segments less plausible? Because (of course) I'm getting more segments as it seems...

@patsecrest9208 4 жыл бұрын

Good video as usual, but harder for me to follow becaue there are so many options.

@FamilyHistoryFanatics Жыл бұрын

Watch these follow-up videos. Then let me know if I have explained the options better. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@leiladjemal5987 Жыл бұрын

I don't know how to understand the one to one match results. What does this means? Largest segment = 10.7 cM Total Half-Match segments (HIR) 27.7cM (0.773 Pct) Estimated number of generations to MRCA = 4.5 3 shared segments found for this comparison. 145404 SNPs used for this comparison. 52.142 Pct SNPs are full identical

@roselynewilson6169 4 жыл бұрын

Can you tell by the number of cM and segments if the fathers of two stepsisters are related? And is there a tool on Gedmatch Genesis to this out? Much appreciate your reply. Thanks.

@FamilyHistoryFanatics 4 жыл бұрын

Yes, because normally stepsisters wouldn't share any DNA. One-to-One comparison on GEDMatch.

@Dottie31778 4 жыл бұрын

Because...…. the bars says Base segments with full match green, and I have a lot of green in the graphs, so isn't that contradictory??

@kathythompson1066 5 жыл бұрын

This vid has lost me because I don't understand chromosomes, SNPS, etc etc. Which vid should I watch to help me with this?

@cynthiaholmes2080 4 жыл бұрын

Then tell me why this would be useful?

@FamilyHistoryFanatics 3 жыл бұрын

Try this video to better understand what a centimorgan is kzfaq.info/get/bejne/a7ydmquAza2amaM.html Also, try this brief post www.23andme.com/gen101/snps/

@shirleypaslay2019 2 ай бұрын

I was hoping you would explain the analysis at the bottom of the page.

@Fm-rf5dx 4 жыл бұрын

Hello thanks for the video as it is very helpful. I analyzed a mother and son whom are both related to myself. they both had the most segments that matched that i've ever seen. but when i ran the sons dna against mine dna there was no matching segments at all. why is this?? as I have a another cousin that by which supposedly we share both the same 2nd and/or 3rd grandparents that dont come up as a match to myself either please explain what is happening here.

@FamilyHistoryFanatics Жыл бұрын

A mother and son would have a half match on every single chromosome, it wouldn't look segmented like you see with most matches.

@elainewaumsley1670 3 жыл бұрын

Help please! I've watched the first video - how to join and upload my DNA profile. Which one comes next? Is there a list showing which order to watch them?

@FamilyHistoryFanatics 2 жыл бұрын

Yep. I made this video at the beginning of 2021 kzfaq.info/get/bejne/rameqcWZkqjemYU.html

@melvinschofield5423 3 жыл бұрын

Well, here I was, hoping that this GEDmatch would allow me to identify who I share my DNA with, and by what links. I am now faced with the results of my One-To Many analysis. Haven't a clue what most of it means. I tried a one-to-one test with the first match on the one-to-many list, and I am told that we have seven shared segments. There's also stuff about centimorgans, MRCA, etc. WTF does it all mean? Where do I go from here? Having looked at a couple of the videos hasn't helped. Now, looking at the comments made by many other people, it is clear I am not the only one who is baffled, so I get the feeling that there is no point in wading through any more videos. I had hoped that this this site was going to be really helpful, but now I'm not sure if its worth spending any more time on. Unless someone can point me at some sort of ground-up, systematic tutorial on this, then I'm out.

@FamilyHistoryFanatics Жыл бұрын

First, GEDmatch has struggled for several years to make the tools easier to understand. It's not geared toward the novice genetic genealogist due to it's huge learning curve. Second, I made this video in 2018 and have since released two follow up videos about the One-to-One tool. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html You're not alone in feeling frustrated. I'm doing my best as a fan of the tools (I don't work for them) to help folks understand the website.

@princessadora Жыл бұрын

centimorgans tell you how closely related you are. mrca means 'most common recent ancestor' so that might be that you share the same 2nd great grandparents. so will add the generations: parent is 1, grandparent 2, great grandparent 3 and gr gr 4 so you might get a number like 4 which implies it's your 2nd great (its only an estimate - but it is pretty decent). gedmatch is the hardest site to use as a beginner the only way it gets easier is by spending more time there and learning about it in facebook groups and other sites like youtube

@melvinschofield5423 Жыл бұрын

@@princessadora Just come across this. Thank you! Now I at least know what MRCA means. You say that Gedmatch is hard to use for a beginner. Are you able to advise on other sites which are easier? Thanks again.

@princessadora Жыл бұрын

@@melvinschofield5423 once you start learning gedmatch it starts looking easy, it just looks very confusing and complicated more than anything due to the layout. It’s the best site for what it offers.

@melvinschofield5423 Жыл бұрын

@@princessadora OK thanks. Perhaps I will have another go and persevere!

@thelmayacabobish2687 3 жыл бұрын

I agree with many of the other posters...way too technical for the novice ancestry student....how about creating a "GEDmatch for Beginners".

@FamilyHistoryFanatics 3 жыл бұрын

I'm working on that.

@chiefsub68 2 жыл бұрын

Hello. Thank you for a great video. I have been working with someone whom I expected to be a very distant cousin (shared foreparents born circa 1790; my 3x gt grandparents). We have the paper trail, which we have worked on over several years. There was no match on the standard settings. I then fiddled the Minimum Segment Threshold Size to 100 and the Minimum Segment to 4.0. This returned a largest segment of 4.6cM, with total half-match segments of 13.1cM (0.356%). Is this the sort of match you would expect at that distance or is it too faint to count? Would we be blending into the background population DNA for the NW of England?

@FamilyHistoryFanatics 2 жыл бұрын

The problem with this is that because the segments are so small (and the SNPs are small), you don't know whether the segments are from descent (confirming the paper trail relationship) or by chance (neither confirming nor denying the paper trail relationship). As a test of this, I compared myself (primarily English origin) to my sister in law (Mexican - mix of spanish, native american, and African). Using your parameters, the largest segment we share is 4.4 cM and a total of 21.3 cM. I tried with several other unrelated people, and had the same result. You could get the same results with almost any 2 random people. At these small of segment size, 90%+ are by random chance.

@Nicholelevels 3 жыл бұрын

I have to upload my mutations which are on a pamphlet so how do you upload that? Or do you just type it in? I must be overlooking that

@FamilyHistoryFanatics 2 жыл бұрын

You have to upload a raw file kit that was downloaded from the testing site. It has about 600,000 lines of code.

@Dottie31778 4 жыл бұрын

My question to you is: at the bottom, if it says "no DNA segments found" does that mean we are not related in any way??

@FamilyHistoryFanatics 4 жыл бұрын

Not necessarily, just that you don't share any DNA.

@valglofcheskie8516 Ай бұрын

I did a 1to 1 and the colour was mauve for 4 different kits managed by the same person. The cM was in the 30's and the SNPs were high and MRCA about 4.1. I see the table - for density. I assume the dark blue is the most dense and therefore a better match that if the bar was blue? Thanks

@nicnicou9836 3 жыл бұрын

Could you tell me what Pct stands for and what is means? if the pct is low or if the Pct is high? And what would you classify as low, average and high?

@FamilyHistoryFanatics 2 жыл бұрын

Percent. In this case, we are looking at how many of the SNPs are fully identical. 50% or more is typical. 80% can be seen for close relatives.

@thoskel1 Жыл бұрын

Can I bring up just the names and emails of common matches when comparing two separate kits?

@MarkLaPoint Жыл бұрын

I just want to know what the color bars mean in terms of relationship

@annemaassen5576 3 жыл бұрын

Which video is the starting place to understand DNA? Is there a series? Beyond knowing that if we have more matches, the closer we are to be related. Beyond that, I have no idea what any of this means. I'm not stupid by any means, but I need someone to start at the primitive basics.

@FamilyHistoryFanatics 2 жыл бұрын

I don't have one specific video but I've created a few playlists that might be helpful. Genetic Genealogy 101: Principles You Need to Know kzfaq.info/sun/PLcVx-GSCjcdnEg-YtkXA7Nj2YxxamaYKA Genetic Genealogy 201: The Basics of Building a Genetic Family Tree kzfaq.info/sun/PLcVx-GSCjcdmsw25mbI-wJin_9_9QQUzI I apologize that it's taken so long. My wife and I have full-time jobs other than this channel. Plus, we're learning as we go. I wish we would have thought of doing this sooner.

@carolynatkinson5456 Жыл бұрын

Read the first three chapters of Blain Bettingers book. To understand it, I had to read it out loud, take notes, almost word for word, but when I was done with the three chapters like that, I had so many aha moments to things I did not understand before. That is my best advice. Family History Fanatics are great, but you need the basics, Blaine makes it high school dna basic back in the 1970's to when it was first discovered. My class was the first class to be taught it and I did not understand it then. When reading Blaines book, I thought, Oh that is what THAT meant, my teacher could not dumb it down enough, Blaine Bettinger does in those three chapters. Then watch all these videos over and over with that behind you.

@stephanie8205 4 жыл бұрын

It would be nice to see an eg of a distant relation with a small segment as i really dont get it

@FamilyHistoryFanatics 4 жыл бұрын

I can do a video on that next year.

@alemeli 3 жыл бұрын

@@FamilyHistoryFanatics almost 2021 now :(

@scottk1585 3 жыл бұрын

when I do a 1:1 comparison of my kit vs my kit, I have quite a few places that don't match. What's up with that?

@FamilyHistoryFanatics Жыл бұрын

I don't know, glitch in the system.

@pacoimaguy2011 5 жыл бұрын

was means this with my broter? Largest segment = 151.5 cM Total Half-Match segments (HIR) = 3542.5 cM (98.835 Pct) Estimated number of generations to MRCA = 1.0 50 shared segments found for this comparison. 152479 SNPs used for this comparison. 99.994 Pct SNPs are full identical

@FamilyHistoryFanatics 4 жыл бұрын

It looks like you are identical twins since you share 3500+ cM

@paddiervinbarrer5805 Жыл бұрын

what dose it mean when I get a gray line on the bottom of a match , on the graft ? largest seg. 66.3, estimated gen 2.8, 10 shared, 14553 snps. 53.21 full identical ?

@johncurtis6462 Жыл бұрын

Does the number of shared segments indicate how closely someone is related to me? How do I figure out genetic distance?

@antonyandlarainekoerbin1103 6 ай бұрын

I don't understand how the one to one tool can show that a segment in the comparison I am doing fits with phased data (pruple) when I don't have either of my parents kits. Does it work it out somehow else?

@LMotola 3 жыл бұрын

I know I am late to the party but hoping you can answer my question. The comparison also computes the MRCA. If the result is 2 how do we know which kit to apply this to? I am comparing 2 kits where I assume they are niece and aunt (actually half relationship) but it could be a 2 generation difference. Is the 2 applied to the niece and I am correct that the grandfather is the common ancestor or is it applied to the aunt and the great-grandfather is the common ancestor?

@FamilyHistoryFanatics 2 жыл бұрын

I discussed the MRCA scores in this video kzfaq.info/get/bejne/oKhgh62c1JvFnJc.html

@princessncntrolg5220 4 жыл бұрын

When trying to find matches for Paternal side only what is the best way?

@FamilyHistoryFanatics 4 жыл бұрын

Have a close relative (uncle or cousin) from your paternal side and see what matches you share in common.

@coppertone29ferdinandburke11 4 жыл бұрын

Hello Andy Lee I recently had my DNA results from Ancestry DNA and would like to upload my results to GED Match. Can you tell me how to do it?

@billmckee3230 3 жыл бұрын

in Ancestry, click on "DNA", then click on the top-most choice, your summary, then click on "settings" on the right, then go down and find "download my stuff" or similar. This is the file you upload to gedmatch.

@FamilyHistoryFanatics Жыл бұрын

Sorry it took so long to find your comment. Check out this video kzfaq.info/get/bejne/nZ5kjKSi37iVZ4k.html

@Decoy1957 3 жыл бұрын

Q:- Forgetting the chromosomes I look at the five lines of data at the very bottom of the natch data as I can have a low cM but Total Half-Match segments (HIR) or high % & / or shared segments. How much faith can we put in that data?

@FamilyHistoryFanatics 2 жыл бұрын

All of that data is simple facts. Unfortunately, it isn't useful for genetic genealogy (except in a really nerdy sense).

@nicoleheymans135 3 жыл бұрын

Could you also provide tutorials in downloadable Word versions? Easier to search for a specific query, searchable offline, easier on the planet.

@FamilyHistoryFanatics 2 жыл бұрын

I'm a KZfaqr. Sorry. But reach out to GEDmatch support and request such tutorials.

@noidea2126 3 жыл бұрын

Is there a way on GEDmatch to find out whether the Italian percentage that I have in my DNA comes from my Dad or Mom side of the family, if yes, how? I do have a second cousin from my Mom side who also is on GEDmatch

@FamilyHistoryFanatics 2 жыл бұрын

I would look at your matches that you know of on your mom and your dad's side. If there is a lot of Italian among one set of matches, that is the side it is likely on. Otherwise, it is probably not possible.

@janetanderson6173 Жыл бұрын

Hello Mr. Lee, Not sure if this is the exact venue for this, but I have a question about the One-to-One Autosomal DNA Comparison tool. It appears to have changed a bit since the last video you've done about it. SNP density has been added and I need to know what a low SNP density match does to the integrity of the match.

@FamilyHistoryFanatics Жыл бұрын

My wife can relate.

@dioneschwahn 4 жыл бұрын

All I get is overwhelmed when I log in and this video isn't helping me😭. I just see numbers and I don't know what all these builds, snps and everything else means

@FamilyHistoryFanatics 4 жыл бұрын

Take a break, and I'll try and do some more videos that break it down more simply.

@AngelsBabyBella 9 ай бұрын

So are the colored line mine and whoever i chose toco pare

@catsimone2918 2 жыл бұрын

I have compared mine and my mothers dna with the one to one matching. Can I use this to seperate my mothers from my fathers? My father has passed but I would like to delve deeper into the family genetics and relatives.

@FamilyHistoryFanatics 2 жыл бұрын

Yes. Check out a couple of tools: Parental Phasing: kzfaq.info/get/bejne/fZeVgJap0dWxe3U.html The One to Many Tool kzfaq.info/get/bejne/mcuJetlnt7TKdHk.html Essentially, you'll want to figure out which matches match your mother. The matches that don't match her will likely match your father. That's if you parents aren't related within the past 5 generations.

@ktaber317 3 жыл бұрын

Hi Andy, I wanted to thank you for these videos. They have been very helpful. I have been trying to do a comparison of a couple kits to try to figure out how we are related. While I have found a lot of clues I don't have a definitive answer. What is really confusing to me is this person and I are almost a complete match on Chromosome 20 6,938 and 7,949 snips respectively with the break just before K--30M. Unfortunately, I have not found any other relatives with similar matches on 20. The question I have here and to me this sounds crazy, but because she and I share the same 4th grandparent on both our parents, is it possible that we are "Identical by Descent?"

@FamilyHistoryFanatics Жыл бұрын

Yes. However whether that shared segment is from that specific ancestor you would need some more matches to confirm.

@Calhun16 3 жыл бұрын

I am presently in contact with a gentleman from Texas. I'm in Canada. We are both in the twilight of our times. This is a "one to one" compare of our DNA profiles. HELP, WE NEED AN INTERPRETATION. Are my Nova Scotia, Canada Moore folks related to his Canon, Tennessee Moore folks? Largest segment = 9.4 cM Total Half-Match segments (HIR) 9.4cM (0.263 Pct) Estimated number of generations to MRCA = 5.9 1 shared segments found for this comparison. 403972 SNPs used for this comparison. 52.41 Pct SNPs are full identical Comparison took 1.052. CPU time used: 0.042.

@LifeStirredUp 2 жыл бұрын

I can't answer your question, but MRCA means Most Recent Common Ancestor. Yours is 5.9, so basically, you and the other person need to go back 6 generations to find the common ancestor that makes you related.

@FamilyHistoryFanatics Жыл бұрын

Watch these follow-up videos. Then let me know if I haven't explained your results better. 6 Questions to Better Understand GEDmatch One-to-One Tool kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html Beginner's Guide to the GEDmatch One-to-One Tool | Genetic Genealogy kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html

@adriaticseaeyes 5 ай бұрын

So- I entered in a gentleman of a different race than me to see if we shared a common ancestor during the 1800's- at the very end of the Autosomal search, it read: "No shared DNA segments found 0 SNPs used for this comparison." does this mean we are NOT related?

@Vortex_ICEcold Жыл бұрын

I’m a bit confused. So if I were to have green in my graph, does that mean that we share a common ancestor? So if they were part German, for example, would that make me some part German as well?

@maggiedixon4243 4 жыл бұрын

What is the significance of which chromosome you match on with another dna match? In order to break through a brick wall segment about 3 generations back...

@FamilyHistoryFanatics 4 жыл бұрын

It is only significant if you have 3 or more people who all share the same segment. This indicates that they are all related through the same common ancestor.

@sue407 10 ай бұрын

When running a One to One on Gedmatch, the results were all shown as Phased matches. How do I interpre this?

@lesleychamberlain4162 3 ай бұрын

brillant

@Dee-wc1pp 2 жыл бұрын

Is there any Family History places that can help with dna, gedmatch, uploads, and working out who in my family is my father PAR. Plus do i need one of my children to test to work it out properly? thank you :)

@FamilyHistoryFanatics 2 жыл бұрын

You don't need your children if you have tested yourself. Instead, test your oldest living relatives and your cousins. As for people doing genetic genealogy research for you, reach out to www.legacytree.com/fhfanatics. They have experts to help you research your family tree using genetic genealogy.

@kuervobolso 4 жыл бұрын

Thanks for the video, hard to understand but I think I got a idea of the different options that you can change and what everything mean but... The closest match for my wife kit who's helping me to try to find her biological father said to me that I need to change the value of the "Minimum segment cM size" to ONE (1), then I tried her kit number compared to my wife and mine and apparently we are all related! But if I leave it blank just her and my wife kits are matches but I'm not longer a match o either one (which will make much more sense. Need help to understand this! In the video the person explaining how this One to One comparison actually put a value of 10 and then 15, he did not go for a number lower then 7 (the default value). For the record, if I compare my kit with my wife, the lowest I can go to found shared segments is 6 ("Estimated number of generations to MRCA = 7.6 - 1 shared segments found for this comparison."

@FamilyHistoryFanatics 4 жыл бұрын

Very rarely do you want to decrease the minimum segment size below 1. It creates too many false positive matches.

@melissaamaro401 4 жыл бұрын

If I change my SNP to 300 and the cM to 5 and we match (chrome 1 and 10). Does that mean we are distant cousins? I had used the default and we did not match.

@FamilyHistoryFanatics 4 жыл бұрын

No, it more than likely means that you have found some false segments.

@susiebergens7260 4 жыл бұрын

Are one to one comparisons still valid if I am trying to match up with a genealogy line of mine that is dormant (only child of an only child, etc.) for ~4 generations but in a special ancestry group (Irish Palatine) and when I change to 4 cM, 100 SNPs, 100 mismatch bunching - then I get a lot of matches in that special group with some matches at the 20 -70 cM range with 5 -11 segments matching. Are those valid numbers? This whole branch of mine was a dead area (no pun intended) and now it is interesting. I just am not sure if it's really valid. Thanks for your help.

@FamilyHistoryFanatics 4 жыл бұрын

At that low of a level, probably not. The problem with 4cM is the number of false matches greatly outnumber the true matches so most of the people you are looking at share DNA with you by chance, not because of a relationship.

@marianneodell7637 2 жыл бұрын

What do you mean they use a different reference set for determining what the numbers are?

@FamilyHistoryFanatics 2 жыл бұрын

Each company (Ancestry, MyHeritage, 23andMe, etc) have a group of kits that everyone else is compared to to determine what the ethnicity/admixture results are.

@robertlukaszewski8687 4 жыл бұрын

MRCA MOST RECENT COMMON ANCESTOR, WHERE DO I FIND THIS IN GEDMATCH

@FamilyHistoryFanatics 2 жыл бұрын

Try this tool kzfaq.info/get/bejne/hLp4pJV_nMjNnps.html

@lyleeggmolesse5330 3 жыл бұрын

Hi Andy. I'm just wondering if the top chromosome is entirely Yellow with thin green lines and the bottom is Blue does that confirm its definitely a parent?

@FamilyHistoryFanatics 3 жыл бұрын

All chromosomes should have blue across the length of them to be a parent.

@alanheadrick7997 5 жыл бұрын

I thought that the minimum good match is something like 7cM and 700SNP's? Genesis is showing matches that do not have any matching segments. My daughter in laws kit has almost 1500 matches, but maybe only 150 are actually good matches above 7cM 700SNP's. It sure makes a mess out things.

@FamilyHistoryFanatics 5 жыл бұрын

Genesis (and now GEDmatch) uses an updated algorithm that allows matching with less than 700 SNPs. This was mainly because the new chips used by 23andMe and LivingDNA don't have near as much overlap with the other chips.

@beachmonkeycom 3 жыл бұрын

why is this tool important? is there a video explaining why this tool is necessary? is a segment going to tell you how to find your match in your family tree or what the common ancestor is?

@FamilyHistoryFanatics 2 жыл бұрын

I have a number of follow-up videos including the following: kzfaq.info/get/bejne/gbSEdbyDyNDRqXU.html kzfaq.info/get/bejne/np6Bg82K0bm6YoU.html For common ancestor tools, that's the MRCA one. I made that video here kzfaq.info/get/bejne/hLp4pJV_nMjNnps.html

@Avalonthesiren 4 жыл бұрын

I am trying to figure out if I am half siblings with someone instead of 1st cousins. can this help

@FamilyHistoryFanatics 4 жыл бұрын

That should be fairly simple. 1st cousins share around 800 cM of DNA. Half siblings share around 1700 cM.

@geneticnomad8720 4 жыл бұрын

Question. If you lower snp to 25 and 3 cms would all the matches be false? I'm in a group that provides us with ancient kits. I want to believe the match is real but I find I match almost all the ancient kits provided from aall over the world.

@FamilyHistoryFanatics 4 жыл бұрын

All is a superlative, so I try to not use them. In this case, 25/3 would also include all of the matches that were at the default 200-400/7 of which we know half are real. So no all of the matches would't be false. Statistically however, probably 99% of the matches would be so you would be hard pressed to find those real matches.

@princessadora Жыл бұрын

would comparing your own 2 kits on the x look the same as 2 paternal half sisters?.

@FamilyHistoryFanatics Жыл бұрын

Yes, because the X would show half identical across the entire chromosome.

@charleneshaw6516 3 жыл бұрын

I am female and what to research my paternal grandfather, that I never knew. This would be my dad's father. How do I direct my search for persons in that line of the family? I am very interested in finding out information on that side. Thanks!

@FamilyHistoryFanatics 3 жыл бұрын

Take autosomal DNA tests with Ancestry. Transfer that to 23andMe, MyHeritage, and GEDmatch (Because you never know where your matches have tested, so be proactive and test everywhere.) Also have relatives that you know how you are related test as well. This will help you 'divide' your maternal matches from your paternal matches. It also helps when you are trying to see... if Match A matches you and your Dad, then they're likely related either from your paternal grandfather or paternal grandmother. If you can't test your Dad, that's okay. You can test your mother, your mother's siblings, cousins from that side of the family. This will help you rule out any match from that side and then you work with other DNA matches that aren't related to mother's side to find out (slowly) how those folks are related to you. With luck, you'll find 1st or 2nd cousins which would help a lot. Oh... and build your family tree and connect it with your DNA for what you do you. That will also help you separate out your DNA matches on some platforms.

@arinamontag6839 4 жыл бұрын

I have a question regarding confirmation of a paternal/child relationship. Is it true that a say for ex. a bio father and daughter would match exactly about 50% at each and every chromosome 1-22 up to at least 15 genetic marker sites on each and every chromosome 1-22. A male child and his father would show a 50% match at each chromosome 1-23? I feel like I am missing something in comprehending this all and this may be a moronic question but I feel compelled to ask regardless. Reason I ask is because I noticed that on 2 comparisons I did using the kit number of more distant relatives to compare with mine, only 2 and 3 chromosomes graphs popped up and so I assumed these must be the only chromosomes where we shared genetic markers in common. Is this correct or is my understanding incorrect? Thank you

@FamilyHistoryFanatics 4 жыл бұрын

Correct (except for the 15 genetic markers). Autosomal SNP tests involve hundreds of thousands of markers.

@toricreasy4557 4 жыл бұрын

If someone is 2.5 ? I know you said 1.0 would be a parent.:. I’m just wondering is it a cousin or half sibling? We match on a lot of cro but I don’t know how to read them

@FamilyHistoryFanatics 2 жыл бұрын

2.5 is around a 1C1R level of sharing. I use the amount of shared cM far more often than I use the gen column.

@dawngable1738 Жыл бұрын

It seems that you contradict yourself at the end. You say that you do not prevent hard breaks, but then you say to always check the box to prevent hard breaks. Am I misunderstanding? Thanks.

@genesqaured2 3 жыл бұрын

Why there are no results for mtDNA and Y chromosome haplotypes? Could you add these features? TIA

@FamilyHistoryFanatics 3 жыл бұрын

Gedmatch doesn't provide this information. You get that from either 23andMe or Family Tree DNA.

@christineharris8881 3 жыл бұрын

I have done a lot of genealogy and I have my Dna from ancestry on Gedmatch. I have a brick wall with my Shelton family and I have used the Gedmatch ids from wiki tree on the lines I feel are most likely to be mine and I have a match and it says CHR18 B37 start position B 37 end position Centimorgan 11.1 Snps 233. This match didn't provide a gedcom and I haven't been able to contact them so what can I gather from this matching to go forward and try to find the our connection another way?

@charleshoffpauir3752 2 жыл бұрын

A cM value of 11 would, on average, represent a kinship of 4th cousins. However there is considerable variability around these values, especially for distant relationships. (4th cousins would indicate a common ancestor of about Great-great-great grandparents)

@FamilyHistoryFanatics 2 жыл бұрын

Yes. If you have a valid match of more than 7 shared centimorgans (cMs), then you will likely need to research around this match using other methods. Make sure you have created a Leeds Method chart (if they share more than 40 cMs). If not, use the clustering tool for matches with lower cMs kzfaq.info/get/bejne/orqSor1m1peUfp8.html. If you see how your other shared matches relate to that shared match, you might be able to figure this out.

@rosenavarro6733 3 жыл бұрын

I am new to this. I put my kit number out there and someone will say we match and then I will use the autosomal comparison with their kit number and it comes up with no match on my end, what am I doing wrong?

@FamilyHistoryFanatics 2 жыл бұрын

They may see you as a match in the One to Many (quick and dirty calculation) but you aren't really a match in the One to One (accurate calculation)