Natural selection, mutation, genetic drift, nonrandom mating, and gene flow are all mechanisms of ______ and can change allele frequencies in populations.Multiple choice question.geneticsfounder effectsbottleneck effectsevolution

Select all of the following that are mechanisms of evolution and that can alter allele frequencies.Multiple select question.suppositionmutationsedimentationnatural selectiongenetic driftmigration

Two types of factors can govern microevolution. On one hand, mutation is a constant source of new genetic variation. On the other hand, mechanisms that alter existing genetic variation, such as natural selection and genetic drift, can act to alter existing genetic variation. How do those two types of factors compare in terms of the magnitude of their effect on allele frequencies in a population?Multiple choice question.Mutations have a negligible effect on allelic frequencies, while mechanisms such as natural selection and drift can have a dramatic effect.Mutations can have a dramatic effect on allelic frequencies, even when mechanisms such as natural selection and drift are not operating.Both mutations and mechanisms, such as selection and drift, can dramatically and quickly alter allelic frequencies in a population.

A change in allele frequencies that occurs by chance and that tends to eliminate alleles in a population rather than increase diversity is calledMultiple choice question.genetic drift.selection.migration.nonrandom mating.

Genetic drift is a change in allele frequencies that occurs by ______ and, unlike mutations, it tends to eliminate alleles from the population.Multiple choice question.chancedirectional selectionnatural selectionrandom mating

A change in allele frequency following a dramatic reduction in the size of a population is calledA.disruptive selection.B. bottleneck effect.C.stabilizing selectionD.genetic drift.