A heterozygote advantage helps maintain alleles in a population by:
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Correct answer: Providing greater fitness to heterozygotes
Heterozygote advantage occurs when heterozygotes have increased fitness, maintaining both alleles. Sickle cell trait is a classic example. It does not decrease mutation or gene flow.
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More Population genetics questions
- If a population has allele frequencies p = 0.4 and q = 0.6, what is the expected frequency of homozygous recessive individuals?
- Which factor is most likely to increase genetic variation within a population?
- In a recessive disease, the carrier frequency is found to be approximately 1/25. What is the approximate disease prevalence?
- Directional selection acts on a population by:
- A population in which one allele becomes 100% prevalent has undergone:
- Which situation exemplifies genetic drift?