Fastest Force Changing Gene Frequency
Which force changes the gene frequency fastest:
- Migration
- Genetic drift
- Mutation
- Selection — Correct Answer
Explanation:
Correct Answer: Selection
Among the four major forces of evolution, Selection (natural or artificial) is the fastest and most powerful mechanism for changing gene frequencies because it directly and consistently favours or eliminates specific genotypes every generation.
Speed of Forces in Changing Gene Frequency
| Force | Speed of Change | Type | Direction Predictable? |
|---|---|---|---|
| Selection | Fastest | Systemic | Yes |
| Migration | Moderate | Systemic | Yes |
| Random Genetic Drift | Variable (fast in small populations) | Dispersive | No |
| Mutation | Slowest | Systemic | Yes |
Key Notes
- Selection acts every generation; it accumulates changes directionally.
- Artificial selection (animal breeding) is an intensified form of directed selection.
- Response to selection: R = h² × S = i × h² × σP = i × σA × rAP
📚 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.
