Effective population size is usually smaller than the census population size when:
Correct answer: B. The sex ratio is unequal
- A. All animals breed equally
- B. The sex ratio is unequal
- C. Mating is completely random
- D. Generations overlap equally
Explanation
An unequal number of breeding males and females reduces the effective population size because fewer individuals contribute genes equally to the next generation. Unequal reproductive contribution and fluctuating population size can reduce it further.
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Covers genes, chromosomes, inheritance, genetic variation, mutations, heritability and quantitative traits in livestock. It also includes selection methods, breeding systems, inbreeding, crossbreeding, heterosis and evaluation of traits such as growth, milk yield, fertility and disease resistance.
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