Question:
Which one of the following does not help maintain genetic diversity at a given locus?
Which one of the following does not help maintain genetic diversity at a given locus?
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Genetic drift can decrease genetic diversity, especially in small populations, by causing random changes in allele frequencies.
Updated On: Nov 27, 2025
- Heterozygote advantage
- Genetic drift
- Negative frequency dependent selection
- Mutation-Selection balance
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The Correct Option is B
Solution and Explanation
Step 1: Understand genetic diversity maintenance.
Genetic diversity is maintained through mechanisms such as heterozygote advantage (where heterozygotes have higher fitness), negative frequency-dependent selection (where rare alleles are favored), and mutation-selection balance (where new mutations balance out the effects of natural selection).
Step 2: Genetic drift.
Genetic drift, however, is a random process that leads to the loss of genetic diversity in small populations and does not help maintain it. Thus, it is the correct answer as it does not maintain genetic diversity
Genetic diversity is maintained through mechanisms such as heterozygote advantage (where heterozygotes have higher fitness), negative frequency-dependent selection (where rare alleles are favored), and mutation-selection balance (where new mutations balance out the effects of natural selection).
Step 2: Genetic drift.
Genetic drift, however, is a random process that leads to the loss of genetic diversity in small populations and does not help maintain it. Thus, it is the correct answer as it does not maintain genetic diversity
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