Someone has handed you the following graph of changes in the frequency of one al

Question

Someone has handed you the following graph of changes in the frequency of one allele in a population over time. Based on the graph and without any other information, which of the following is most likely true? The allele does not offer any fitness advantage and the population is small. The allele does not offer any fitness advantage and the population is large. The allele offers a fitness advantage and the population is large. The allele was introduced at a very low frequency and the population is large. If the frequency of the HbS allelo is 0.4 in a population, what is the frequency of the HbA allele (assuming this is a two-allele system)?

Explanation / Answer

a. The allele does not offer any fitness advantage and the population is small.

We can see from the graph that the allele frequency reached zero in 20 generations, this is an indication of genetic drift. The effects of genetics drifts are larger in smaller populations.

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