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STD 12 - 6. evolution — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 6. evolution1 Mark
MCQ
Genetic drift operates in
  • ✓
    small isolated population
  • B
    large isolated population
  • C
    non­ reproductive population
  • D
    slow reproductive population.
✓

Answer

Correct option: A.
small isolated population
a
(a) : The random changes in gene frequencies in a population occurring by chance alone rather than by natural selection are called genetic drift or Sewall wright effect. The effects of genetic drift are most marked in very small isolated population, although it occurs in all populations.

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