Better than Sketchy, and completely free. Watch our entire microbiology library right here on KZfaq, for free, forever.
Come check out the rest of our Step 1 library at physeo.com/ for a truly comprehensive approach to preparing for your exam.
Covered in this video: Phenotypic mixing, complementation, recombination, reassortment, genetic (antigenic) shift, random mutation, genetic drift, homologous regions, tropism, superinfection