In which of the following situations is genetic drift likely to occur?
A)A small population of lizards is isolated on a small island.
B)A mouse develops a fur coat that enables it to hide more readily from predators.
C)Two schools of tuna merge together to form one large population.
D)A river changes course, changing the local environment for a population of butterflies.

Question

Quizplus · Accepted Answer

Genetic drift is more likely to occur in small populations, as chance events can have a larger impact on the gene frequencies. The isolation of a small population on a small island would increase the likelihood of genetic drift occurring.

In Which of the Following Situations Is Genetic Drift Likely