A maternal genetic effect on calf weaning weight is best described as the effect of the dam's genes on the calf's performance through:
Correct answer: C. Maternal care and milk production
- A. The sire's chromosome number
- B. The calf's own genotype only
- C. Maternal care and milk production
- D. Random environmental mutation
Explanation
Maternal genes can affect traits such as weaning weight through milk yield, mothering ability, and the uterine environment. These effects are distinct from the direct genetic effects of the calf's own genotype.
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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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