What evolutionary process is defined as random fluctuations in allele frequencies within small, isolated populations?
Answer and explanation
Correct answer: B. Genetic drift
- Step 1: Changes in allele frequencies occurring due to chance events rather than differential reproductive fitness constitute genetic drift. Step 2. Genetic drift has its most pronounced effects in small populations (e.g. founder effect, bottlenecks). Answer: Genetic drift. Why not the others: Directional selection favors specific adaptive phenotypes; artificial selection is human-driven breeding.
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