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Question (English)
Which of the following is NOT a systematic force affecting gene frequency in a population?
- Random genetic drift ✓ Correct
- Migration
- Mutation
- Selection
Explanation:
Correct Answer: Random Genetic Drift
From the notes: Forces affecting Hardy-Weinberg equilibrium are of two types:
1. Systematic Forces (from notes)
Act in both large AND small populations; can be predicted in both amount and direction.
- Mutation: Slowest — rate ~10⁻⁵ per locus per generation. Ultimate source of all new variation.
- Migration (Gene flow): Predictable in amount AND direction. Δq = m(qm – q)
- Selection: Fastest force to change gene frequency.
2. Dispersive Force (from notes)
Acts only in small populations; can be predicted only in amount, NOT in direction.
- Random Genetic Drift (Sewall Wright effect): Random fluctuation in gene frequency in small populations. NOT a systematic force. ✔
📚 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.
