PE week 11 - ln(Nt/No = rt t=1 Nt = No 77,000,000 No =...

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ln(Nt/No) = rt t=1 Nt = No + 77,000,000 No = 6,978,553,382 r = 0.01097. ln(2)/r = t t= 63 years Even if younger generations have a small r (even equal to zero) the total population can still grow. This because the older populations had a large r and human continue living after they reproduce. And because they had many children, the total population will continue to rise even as their children only replace themselves. In other words, there are so many young women in these populations that the overall number of births will stay high, even though the average number of children per female remains low. Those species that experinece "boom and bust "cyles will experience more genetic drift and inbreeding than those that do not cycle. This is because each "bust" event is like a founder event - bottlenecking the number of individuals and alleles available to the population. This increases genetic drift by randomly excluding some alleles that do not exist amongst the relatively small number of survivors. The increased inbreeding takes
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This note was uploaded on 03/08/2012 for the course BIOL 180 taught by Professor Freeman during the Fall '07 term at University of Washington.

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PE week 11 - ln(Nt/No = rt t=1 Nt = No 77,000,000 No =...

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