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In a set of replicate D. melanogaster populations of size 50 established in your lab, you...

In a set of replicate D. melanogaster populations of size 50 established in your lab, you observe 70 A1 alleles and 30 A2 alleles at a locus involved in wing shape. If drift is the only force operating on this population: a) What is the probability of having only 4 A1 alleles in the next generation in any of your populations? b) What is the probability that the A2 allele will be eventually fixed in the population? c) What is the current expected heterozygosity? d) What is the average expected heterozygosity after 15 generations?

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Answer #1

b)

NN population size is 50

pt is the frequency of allele A1 at time t: 70/100=0.7

probability of fixation is equal to its frequency at time t: 0.7

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