The diagram shows the frequency of alleles A and a in a population over three generations. The starting allele frequency of A is p = 0.6.
The population remains in the same location and does not experience any environmental changes. Which best describes what is happening to the population over three generations?
a
allopatric speciation
b
founder effect
c
reproductive isolation
d
genetic drift
d. genetic drift
Genetic drift refers to random changes in allele frequencies in a population over time due to chance events rather than natural selection. In this case, the changes in allele frequencies of A and a over the three generations are likely due to genetic drift rather than any other mechanism.