Positive assortative mating occurs when animals are mated to partners that are:
Correct answer: B. Similar in phenotype for the selected trait
- A. Unrelated by pedigree for several generations
- B. Similar in phenotype for the selected trait
- C. Different in phenotype for the selected trait
- D. Selected only from a different breed
Explanation
Positive assortative mating pairs phenotypically similar animals, such as high-producing animals with other high-producing animals. It can increase genetic uniformity at loci influencing the trait, but it is not the same as deliberate inbreeding.
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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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