In dairy cattle, a sire's predicted transmitting ability for milk yield is approximately what fraction of his estimated breeding value?
Correct answer: C. One-half of the estimated breeding value
- A. Twice the estimated breeding value
- B. Equal to the estimated breeding value
- C. One-half of the estimated breeding value
- D. One-quarter of the estimated breeding value
Explanation
Predicted transmitting ability represents the average genetic merit expected to be passed to offspring, so it is approximately one-half of the sire's estimated breeding value. The other fractions confuse transmitting ability with the sire's total additive genetic value.
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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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