Genetic drift operates in small isolated inbreeding populations. Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance. Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations by affecting the Hardy-Weinberg equilibrium. Genetic drift can have major effects when a population is sharply reduced in size by a natural disaster.
Genetic drift
NEET UG 2016 — Zoology Evolution
2016mcqmedium
Genetic drift
Official previous-year question
Held on 30 Apr 2016 · Verified 9 Jul 2026.
Options
- A
occurs by chance
- B
does not affect Hardy-Weinberg equilibrium
- C
do not change the frequency of genes and alleles in future generation
- D
slows down the formation of reproductive population
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