Chap 5   Chapter 6 extras: Chromosomes and Cell Division   Chap 7

"In the first step of meiosis, you don't divide by two, you multiply by two." - David C. Page

Supplementary videos
DNA packaging: histones and nucleosomes (HHMI)
Evolution of human chromosome #2: why do humans have 46 chromosomes, other great apes have 48?
Seedless Watermelon (Bite-Sci-zed triploid Colchicine tricks!)
Calico cat and X inactivation: random deactivation of an X chromosome
Meiosis, crossing over, and the SRY gene: XX males and XY females (HHMI)
Everything You Never Knew About Sex 10:50 "Why do men have nipples?"
Evolution of Y chromosome over 300 million years: are the X and Y really homologous? (HHMI)

Extra credit readings

Additional material

Copyleft Peter Chen