15_Migration_Inbreeding

15_Migration_Inbreeding - Gene GeneFlowandInbreeding Today...

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ene Flo and Inbreeding Gene Flow and Inbreeding d ’ ti Today’s questions: I. How does gene flow cause changes in allele frequencies? H d ib d i d th f f II. How do inbreeding and other forms of non random mating cause changes in genotype equencies? frequencies? III. How do inbreeding and the 4 evolutionary forces fect endangered species? affect endangered species?
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I. How does gene flow change allele frequencies? A. Theory: The one island model One way movement of individuals (and their alleles) from a large opulation on a continent to a small population on an island population on a continent to a small population on an island Suppose that allele A 1 is at frequency 1.0 on the island and that there are 800 breeding individuals Suppose that allele A 2 is at frequency 1.0 on the continent (very large population)
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If 200 individuals move from the continent to the island and begin to breed, the frequencies of alleles in the island population are now: Evolution has occurred because of gene flow
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B. What are the evolutionary consequences of gene flow?
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15_Migration_Inbreeding - Gene GeneFlowandInbreeding Today...

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