Inbreeding depression is most commonly expressed as reduced:
Correct answer: A. Heterozygosity and performance
- A. Heterozygosity and performance
- B. Homozygosity and performance
- C. Mutation rate and fertility
- D. Chromosome number and growth
Explanation
Inbreeding increases homozygosity and can expose harmful recessive alleles, reducing traits such as fertility, survival and growth. Therefore, the typical result is reduced performance rather than reduced homozygosity.
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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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