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.

Question

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
genetic drift
b
reproductive isolation
c
allopatric speciation
d
founder effect

Answer 1

a) genetic drift

The changes in allele frequency over the three generations are most likely due to genetic drift, which is the random fluctuation of allele frequencies in a population. This can occur in small populations and can lead to changes in the genetic makeup of the population over time.