EvolutionMediumBloom L1
Question
Genetic drift operates only in
Options
A.smaller populations
B.larger propulations
C.Mendelian populations
D.island populations
Solution
(a) [Key Concept: Genetic Drift — Strongest in Small Populations] Genetic drift operates most effectively (and has the greatest impact) in smaller populations. In small populations, chance events can dramatically alter allele frequencies from generation to generation (sampling error). In large populations, random fluctuations tend to cancel out, making drift negligible.
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