There are 40 individuals in population 1, all of which have genotype A1A1, and there are 25 individuals in population 2, all of genotype A2A2. Assume that these populations are located far from one another and that their environmental conditions are very similar. Based on the information given here, the observed genetic variation is mostly likely an example of

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Genetic drift is the random change in allele frequencies that occurs in small populations and can lead to the loss of genetic variation. In this case, the two populations are small and isolated, so genetic drift is the most likely explanation for the observed genetic variation.

There Are 40 Individuals in Population 1, All of Which