There are 25 individuals in population 1, all with genotype AA, and there are 40 individuals in population 2, all with genotype aa. Assume that these populations are located far from each other and that their environmental conditions are very similar. Based on the information given here, the observed genetic variation most likely resulted from
A) genetic drift.
B) gene flow.
C) nonrandom mating.
D) directional selection.

Question

Quizplus · Accepted Answer

The observed genetic variation between the two populations is most likely due to genetic drift, as the populations are isolated and have fixed different alleles (AA in population 1 and aa in population 2) due to random changes in allele frequencies over time.

There Are 25 Individuals in Population 1, All with Genotype