The three main mechanisms that alter allele frequencies and change the genetic composition of populations are
A)natural selection, bottleneck effect, and founder effect.
B)natural selection, gene flow, and random mating.
C)natural selection, genetic drift, and gene flow.
D)natural selection, random mating, and gene flow.
E)natural selection, gene flow, and large population size.

Question

Quizplus · Accepted Answer

Natural selection is the mechanism by which the environment selects for or against certain traits, leading to changes in allele frequencies over time. Genetic drift is the random fluctuation of allele frequencies in small populations, which can lead to the loss of certain alleles. Gene flow is the movement of genes between populations, which can introduce new alleles or alter the frequency of existing ones. These three mechanisms can all cause changes in allele frequencies and genetic composition of populations. The other answer choices either do not include all three mechanisms or include incorrect mechanisms.

The Three Main Mechanisms That Alter Allele Frequencies and Change