Alternative Name for Random Genetic Drift
Random genetic drift is also known as-
- Panmixia
- Sewall Wright effect — Correct Answer
- Both a & b
- Inbreeding
Explanation:
Correct Answer: Sewall Wright effect
Random genetic drift is named the Sewall Wright effect after the pioneering American geneticist Sewall Wright who mathematically described how random sampling of gametes in small populations causes unpredictable fluctuations in allele frequencies.
Genetic Drift — Key Features
| Feature | Details |
|---|---|
| Also known as | Sewall Wright effect / Allelic drift |
| Type of force | Dispersive force (NOT systemic) |
| Population size | Only significant in small populations |
| Predictability | Can be predicted only in amount (variance); NOT in direction |
| Effect | Random fixation or loss of alleles; reduces genetic diversity |
Why Other Options Are Wrong
- Panmixia: Random mating — a key assumption of H-W equilibrium; not related to drift.
- Inbreeding: Mating between related individuals — increases homozygosity systematically; different from random drift.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
