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 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.

f genetic drift is followed over a great many generations, what is its expected effect on allele frequencies?Multiple choice question.The ultimate effect of genetic drift over many generations is always loss of alleles.Alleles are either lost (frequency of 0%) or fixed (frequency of 100%) in the populations.Over many generations, genetic drift tends to make the frequencies of all alleles of a particular gene the same.

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

Multiple Choice QuestionOver time, genetic drift can lead to the fixation of an allele. What types of alleles are usually fixed by drift?Multiple choice question.Only beneficial traits can become fixed due to genetic drift.Only beneficial or neutral traits can become fixed due to genetic drift.Genetic drift is random, so deleterious, beneficial, or neutral alleles can become fixed.

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