The factor that leads to Founder effect in a population is:
Answer: (B) Genetic drift. Answer: (B) Genetic drift.
- A.Mutation
- B.Genetic drift✓
- C.Natural selection
- D.Genetic recombination
Correct Answer
(B) Genetic drift
Solution & Explanation
Answer: (B) Genetic drift. When allele frequencies change purely by chance in a small migrating sample of a population, this is called genetic drift. If the chance change is so large that the drifted population becomes the founders of a new population, the phenomenon is called the founder effect; thus the founder effect is a consequence of genetic drift. NCERT Reference: Ch 6 Evolution, p.121, lines 21–24: "If the same change occurs by chance, it is called genetic drift. Sometimes the change in allele frequency is so different in the new sample of population that they become a different species. The original drifted population becomes founders and the effect is called founder effect."