Which statement best describes a selection index in animal breeding?
Correct answer: D. It ranks animals using several sources of information
- A. It estimates environmental temperature effects
- B. It measures only the animal's physical size
- C. It records only the number of offspring
- D. It ranks animals using several sources of information
Explanation
A selection index combines information on several traits or records using economic and genetic relationships to rank animals for selection. It is therefore different from a measurement of one physical characteristic alone.
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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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