A breeder selects animals for high growth rate, but their reproductive performance declines because the two traits have an unfavorable genetic association. This outcome illustrates:
Correct answer: B. An antagonistic genetic correlation
- A. A neutral environmental effect
- B. An antagonistic genetic correlation
- C. A Mendelian segregation ratio
- D. A chromosome counting error
Explanation
An antagonistic genetic correlation means improvement in one trait is genetically associated with deterioration in another. Selection objectives may therefore need an index that balances growth and reproductive performance.
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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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