BIO220H1 Lecture Notes - Lecture 14: Internal Fertilization, Bluegill, Bed Bug
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BIO220H1 Full Course Notes
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Slide shows a few species where males are colourful and females less colourful: chickens: rooster is really elaborate, hen is quite drab, angler fish: big fish = female, tiny blob = male. Humans: not quite so much variation between males and females. That"s at the phenotypic level: how about the genetic level. About 90% of genes are shared between males and females, but . Males and female humans share autosomes: = 90% of genes are the same between males and females. But most genes expressed differentially between males and females: happens in gonads (expected, but also happens in tissues that functionally similar. Evolution of sexual differences plan for today. Puzzle of conspicuous ornaments: obvious differences between males and females. Male-male competition: one of driving forces in differences we see. For birds = males who have conspicuous ornament: females quite drab. Why is there this variation across species/individuals/populations.
