Dominance variance in a quantitative trait results mainly from:
Correct answer: B. Interactions between alleles at the same locus
- A. Interactions between genes at different loci
- B. Interactions between alleles at the same locus
- C. Environmental differences among management groups
- D. Changes in allele frequency across generations
Explanation
Dominance variance arises when the combined effect of two alleles at one locus differs from the sum of their average effects. Interactions between genes at different loci are called epistatic or other epistatic effects.
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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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