Bottlenecks increase the effect of which of the following?
Correct answer: C. Genetic drift
- A. Genetic linkage
- B. Genetic expression
- C. Genetic drift
- D. Gene pool
Explanation
Bottlenecks reduce population size drastically, causing a sharper impact of genetic drift. This leads to random changes in allele frequencies, which can significantly alter genetic diversity in the population. Genetic linkage and expression are not directly amplified by bottlenecks, and while a bottleneck reduces the gene pool, it does not increase the gene pool's effect.
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About Evolution
Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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