Three islands (A,B and C) support isolated populations of a large species of web

Question

Three islands (A,B and C) support isolated populations of a large species of web-spinning spider. These spider populations have 2 alleles at the venom locus V1 and V2 but differ in allele frequencies- Island A: f(v1)=0.22 f(v2)-=0.78; Island B f(v1)=0.77, f(v2)= 0.23; Island C f(V1)=0.98 F(V2)= 0.02. If genetic drift is the only force influencing the frequencies of these 2 alleles, for which island is the probabilty that f(v1) will increase in the next generation highest?

A. Island A
B. Island B
C. Island C
D. Equal probability for A,B,C
E. It would depend on the population size

Explanation / Answer

A. Island A

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