GK
BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as
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Genetic drift
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Genetic load
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Genetic flow
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Random mating
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Explanation:
Detailed explanation-1: -Assertion :Genetic drift refers to change in allelic frequencies of a gene pool due to chance and occurs both in large and small populations. Reason: Small populations will, therefore, suffer more than larger ones.
Detailed explanation-2: -What is genetic drift? Genetic drift is change in allele frequencies in a population from generation to generation that occurs due to chance events.
Detailed explanation-3: -These changes in allele frequencies across generations caused by random events are called genetic drift.
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