Allele frequencies of a population can change by A. natural selection. B. genetic drift. C. mutations in the gene pool. D. founder effect. E. All of the above.

E. All of the above.

Explanation:

Natural selection is a process in which individuals with certain characteristics that makes them better fitted to survive in an environment become selected for and reproduce those changes in subsequent generations, which become more established than those individuals with characteristics that do not make them better adapted to the environment.

Genetic drift, by definition, is a change in the allele frequencies of a population over time due to evolutionary forces that selects individuals by chance. Founder effect, for example, is a factor that can increase the genetic drift in a population. Founder effect occurs when a new colony is established by a small number of a population that have come isolated from their original large population, and as a result of this, genetic variation is lost over time, as this new sub population becomes quite different from the original population.

Mutations in the gene pool of a population, is another evolutionary force that causes a change in allele frequencies as new alleles are introduced, or some alleles are taken away from a population.

Allele frequency, which refers to how common an allele of a trait is in a population, can be changed by natural selection, genetic drift, mutation, and also founder effect.

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