When both drift and selection are acting on a locus (alleles are not neutral and the population size is finite), which of the following can occur?
A) Natural selection can increase the effect of genetic drift.
B) Neutral mutations are subject to natural selection.
C) Genetic drift can result in heterozygous advantage.
D) Beneficial mutations can be lost from the population.

Question

Quizplus · Accepted Answer

When both drift and selection are acting, beneficial mutations can still be lost from the population due to the impact of genetic drift, which can override the effects of selection in small populations.

When Both Drift and Selection Are Acting on a Locus