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Unformatted text preview: (indiscriminate sampling) Hardy-Weinberg:-Given: o No selection o No immigration, no emigration o Random mating o No mutations o Infinite population size. Because this is never fulfilled, there is always drift.-Then: (A, p) (a, q) A= allel, p,q= proportions o AA Aa aa o P 2 2pq q 2-Evolution = change in gene/genotype frequencies. This says no evolution because no change in gene frequencies.-If we can measure up the assumptions (givens) then we can product with perfect precision what the gene frequencies and genotype frequencies. p = spq 2 / (1-sq 2 ), s = selection coefficient. Turns out, PNS is the second law of biology. Just like Newtons second law: if theres a force acting on an object, the object experiences acceleration. The first law of Newton is that bodies at equilibrium remain at equilibrium unless acted on by an outside force. The principle of drift is the first principle of biology....
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This note was uploaded on 02/22/2012 for the course HIST 2312 taught by Professor Staff during the Fall '10 term at Texas State.
- Fall '10