A genetic correlation of -0.80 between two traits indicates that selection for higher values of one trait will generally:
Correct answer: B. Cause a correlated decrease in the other trait
- A. Cause no correlated change in the other trait
- B. Cause a correlated decrease in the other trait
- C. Produce an identical increase in the other trait
- D. Remove environmental variation in the other trait
Explanation
A strongly negative genetic correlation means that the additive genetic effects increasing one trait tend to decrease the other. The correlated response is not necessarily identical in size because heritabilities and selection criteria also affect its magnitude.
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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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