Question

In genetic drift, the allele frequencies in a gene pool change because of


Select an answer

A.
mutations


B.
chance


C.
natural selection


D.
genetic equilibrium

Answer 1

B.

Genetic drift is the change in allele frequencies due to random chance (sampling error), especially pronounced in small populations (e.g., bottleneck and founder effects). It is not driven by natural selection (nonrandom) or by mutation (which introduces new alleles), nor by genetic equilibrium (which describes no change).