Factors Affecting Genetic Variation — Quiz

Question 6 • TPS EdX Biology

Which best defines gene flow?

Answer

the sum of all genetic traits in a population’s individuals at a given time

the random change in the frequency of an allele in a population

any movement of organisms from one environment to another

any movement of genes from one population to another

Explanation

Gene flow occurs when genes move between populations, usually because individuals migrate and reproduce in a different population. Therefore, the best definition is “any movement of genes from one population to another.” Choice A describes a population’s gene pool, while B describes genetic drift.

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