Why can genetic drift have a strong effect in a small population?
Answer and explanation
Correct answer: Survival or death of a few individuals by chance can quickly change the trait ratio
Genetic drift is a random change in the frequency of inherited variants. In a small population, each individual represents a relatively large fraction of the gene pool. Therefore, the chance death, survival, or reproduction of only a few individuals can greatly alter the proportion of variants in the next generation. Option A is correct; small populations still have chromosomes, reproduce, and contain variation, so B, C, and D are false.
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What is the correct answer to this question?
Survival or death of a few individuals by chance can quickly change the trait ratio
Why is this the correct answer?
Genetic drift is a random change in the frequency of inherited variants. In a small population, each individual represents a relatively large fraction of the gene pool. Therefore, the chance death, survival, or reproduction of only a few individuals can greatly alter the proportion of variants in the next generation. Option A is correct; small populations still have chromosomes, reproduce, and contain variation, so B, C, and D are false.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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