Narrow-sense heritability of a quantitative trait is the proportion of phenotypic variance due to which component?
Correct answer: A. Additive genetic variance
- A. Additive genetic variance
- B. Dominance genetic variance
- C. Permanent environmental variance
- D. Temporary environmental variance
Explanation
Narrow-sense heritability is additive genetic variance divided by phenotypic variance. Additive effects are transmitted predictably from parents to offspring, whereas dominance and environmental effects are not measured in narrow-sense heritability.
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About Animal Breeding and Genetics
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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