The Diversity of Development: Embryos and Evolution

  Рет қаралды 22,887

University of California Television (UCTV)

University of California Television (UCTV)

16 жыл бұрын

How does variation in genes generate the beautiful diversity of animal body shapes that fill the world? UCSD Biologist William McGinnis explains that all animals, whether fish, fowl, or fly, share similar architectural control genes called Homeobox genes. The discovery and study of these genes has led to an understanding of how subtle changes in Homeobox genes can lead to changes in animal form during evolution. Series: "Evolution Matters" [2/2008] [Science] [Show ID: 13545]

Пікірлер: 28
@kereng5
@kereng5 11 жыл бұрын
The drawing in Minute 14 is not by Karl Ernst von Baer (1792-1876) but by Ernst Haeckel (1834-1919). Karl Ernst von Baer, however, was the one who didn't label his bottled embryos.
@JoseChavez-gd3ws
@JoseChavez-gd3ws 5 жыл бұрын
Fantastic thanks for your time
@qigong1001
@qigong1001 16 жыл бұрын
Feel free to argue with ideas from 120 years ago. No biologist has agreed with Haeckel's drawings or ideas for decades, lest they be uneducated! The fact is that evolutionarily linked species share common features early in EMBRYONIC development.
@ndjarnag
@ndjarnag 16 жыл бұрын
yeah, I am in the same boat. I try to keep an open mind...
@injunsun
@injunsun Жыл бұрын
@42:50 in or so, I noticed an interesting trend relating to Sociology. "Steamboat Willie" was essentially a black-face character. Over time, as with Italians, Irish, and Polish people, the concept of Whiteness was extended to them, and Mickey (and Goofy) became a White guy with black hair. Who knows what he is now, but I found it interesting that, just as White society expands its concept of Whiteness to become ever more inclusive, Mickey Mouse went from being an obvious stereotype of what Whites imagined Black people to be like, to becoming White. The more beloved a character became, the Whiter they became, both in appearance, and in their portrayals of actions and motives, relating to stereotypes.
@PhilWithCoffee
@PhilWithCoffee 13 жыл бұрын
Fruit flies piss me off. Someone in a lab on the same floor as mine does work with them. Heaven help the person that's eating an apple or orange. Interesting video, although not what I was looking for, I was hoping for more info on the homeobox. There's not much on it this gene sequence, at least in terms of lectures.
@WorthlessWinner
@WorthlessWinner 12 жыл бұрын
@mayartay The basic features of processes are shared even if they differ in details. Look at the diversity of life especially bacteria and you'll see it's possible to do things a lot simpler than we do.
@rapton
@rapton 14 жыл бұрын
@Mayartay Behe and his arguments that were detailed in Darwins black box were beaten down badly when they were brought to court in Dover. In addition his views have not survived peer review.
@mariabrigit8197
@mariabrigit8197 9 жыл бұрын
Hox genes are epigentically and genetically regulated during development - as Nova website for Ghost in your genes "Not all switches are epigenetic. As this slide show reveals, some are genetic-and amazingly powerful". See articles that explain the Hox mechanism www.pbs.org/wgbh/nova/body/epigenetic-mice.html www.pbs.org/wgbh/nova/body/gene-switches.html
@qigong1001
@qigong1001 16 жыл бұрын
And yes, the mathematics DO ADD UP, when you take into account all relevant factors, like mutation, plasmid transfer (bacteria), sexual recombination, and simply using the same old genes in new ways...see the work of Sean Carroll. All of course via natural selection.
@WorthlessWinner
@WorthlessWinner 12 жыл бұрын
@mayartay Ignorant of what exactly? Any teaching to a general audience is going to involve simplified examples. If he left it at "life is like a watch" and didn't go further fine, but he elaborated on the molecular genetics of it later. Starting off with a simple comparison between things that are similar in the relevant details seems fine.
@thefryingpan951
@thefryingpan951 8 жыл бұрын
this is pretty ham
@geneseeker3
@geneseeker3 16 жыл бұрын
I used to believe the world and all of life was created in 6 days . . . but now I am not so sure.
@JoseChavez-gd3ws
@JoseChavez-gd3ws 5 жыл бұрын
In 6 days 6000 years ago Bugles the .mind
@WorthlessWinner
@WorthlessWinner 12 жыл бұрын
@mayartay He hardly mentions evolution. He shows photographs of developmental genetics experiments showing how shared and simple it is. That you think n.s. can be added to "chance" in brackets like it isn't the main focus of evolution shows your using the same 'selective emphasis' you accuse 'Darwinists' of. Just because you have a "purpose," doesn't mean 'Darwinists' do. I smell projection.
@garsayfsomali
@garsayfsomali 2 жыл бұрын
It's the modern day version of the emperor with no clothes. they want us to fill in the blanks with their worldview. No mate Give us the information raw and unaltered and let us reach the conclusions we want
@jesseveeee
@jesseveeee 13 жыл бұрын
@MrHennessy1303 yeap (n)
@johnboland91
@johnboland91 14 жыл бұрын
@rapton Yeah Behe isn't even really a legitimate scientist, church funding is the only reason he has any kind of recognition.
@AngelKay7
@AngelKay7 13 жыл бұрын
My grandfather was a Presbyterian minister and he believed in evolution. He often said science tells you how and the Bible tells you Who.
@helenab8257
@helenab8257 5 жыл бұрын
Yes !
@JoseChavez-gd3ws
@JoseChavez-gd3ws 5 жыл бұрын
Neg it can't be Bible said the planet earth was created in 6 days 6000 Years back. And spices estar Evolving more than 375,000.000 Million years.how can he reconcile That the Bible is full of shit
@thebluebus
@thebluebus 15 жыл бұрын
he says "uh/um" a lot :/
@12valvelove
@12valvelove 12 жыл бұрын
Too bad evolution isn't true for Humans. We were created in "his" image.
@1Crypto
@1Crypto 15 жыл бұрын
coz he is "lying" a lot.
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