How does migration affect the genetic makeup of a population? explain

Ometimes, there can be random fluctuations in the numbers of alleles in apopulation. These changes in relative allele frequency, called genetic drift, can either increase or decrease by chance over time. ... Genetic drift can result in the loss of rare alleles, and can decrease the size of the gene pool. hope i helped ^-^

Typically, genetic drift occurs in small populations, where infrequently-occurring alleles face a greater chance of being lost. Once it begins, genetic drift will continue until the involved allele is either lost by a population or is the only allele present at a particular gene locus within a population

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Bis the correct answer.

The answer is c i just finished taking the test