Biology 1001A Lecture 24: Bio 1001A L24.docx
24 Jun 2015
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Medical, agricultural, and technological advances weaken natural selection? (cid:224) only in industrialized, rich countries increase in monogamy weakens sexual selection? (cid:224) monogamy isn"t universal (cid:224) polygamy still exists in human populations around the world fewer mutations? (cid:224) on average, monogamous societies have younger fathers (sperm continuously generated from dividing precursor cells) (cid:224) older you are, more cell division cycles, therefore more mutations decreasing randomness (drift)? (cid:224) human populations are increasingly large and mobile, decreased inbreeding, increased assortative mating: accelerating evolution: selective sweep: when beneficial mutations increase in frequency, so (temporarily) do surrounding stretches of sequences detect sweeps, and estimate speed of adaptive evolution, by analyzing sequence variation around snps.
