Now lets introduce a small amount of migration

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Now let’s introduce a small amount of migration. Suppose there are only A 1 A 1 genotypes on the mainland near our island and every 20 generations a migrant arrives. Select “Source-Sink” mode for Migration, set Freq. A 1 = 1.0 and Rate=0.05. (34) On the figure below, graph your prediction of the frequency of allele A 1 through time. Consider the shape of the curve as you do so (e.g., Is the spread or loss of the allele constant? Does the rate of spread or loss of the allele slow down or speed up Freq A 1 0 Time (generations) 1
Freq A 1 1 0 Time (generations)
Make sure all parameter values are set as described above. Click “Go”. (35) On the figure above, sketch the results of the simulation. Do your predictions match the results?
(36) Compare the results of this simulation with the previous one. What was the effect of migration on the evolutionary process?
(37) How are the results of this simulation different from the previous two?
(38) In terms of effects on allele frequencies in the focal population (our island), the effects of migration are analogous to what other evolutionary force?
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