In evolutionary biology, what evolutionary mechanism describes random fluctuations in allele frequencies in small populations due to chance sampling events?
Answer and explanation
Correct answer: B. Genetic drift (including bottleneck and founder effects)
- Step 1: Genetic drift consists of stochastic changes in allele frequency that are independent of fitness, exerting strong effects in small cohorts. Answer: Genetic drift (including bottleneck and founder effects). Why not the others: Natural selection changes allele frequencies based on adaptive fitness advantages.
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