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in Biology by (51.1k points)

How would the gene flow or genetic drift affect the population in which either of them happens to take place?

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Genetic drift refers to the alteration in the frequencies of alleles in the gene pool of a finite population due to chance events. It takes place in one or over a few generations. If the change in the allele frequencies is very drastic, then new species are formed. If the population is finite or limited, a random selection of alleles occurs and in such a scenario, the frequencies of alleles in a sample may not be the same as the frequencies of alleles in the total population. This is known as sampling error.

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