Which evolutionary mechanism produces random fluctuations in allele frequencies in small populations due to chance sampling events?
Answer and explanation
Correct answer: D. Genetic drift (bottleneck and founder effects)
- Step 1: Genetic drift refers to stochastic changes in allele frequencies that disproportionately affect small populations. Step 2. Founder effects and population bottlenecks are classic manifestations of genetic drift. Answer: Genetic drift (e.g. bottleneck and founder effects). Why not the others: Natural selection is non-random adaptive differential reproduction.
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