Genetic drift

A) is more likely to occur in a large population than in a small population.
B) may lead to an allele becoming fixed in a population.
C) increases the number of heterozygotes in a population.
D) has no impact of the allele frequencies of a population.
E) reduces the chances of mutation in a population.

Genetic drift refers to the random fluctuations in allele frequencies that occur due to chance events. It is more likely to occur in small populations rather than large ones because chance events have a bigger impact on small populations. Genetic drift may lead to an allele becoming fixed (i.e., the allele is the only one present in the population) or lost in a population, which can have significant effects on the genetic diversity of the population. Therefore, choice B is correct. Choices A, C, D, and E are incorrect because they do not accurately describe the impacts of genetic drift.