In the genetic value equation G = A + D + I, what does A represent?

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Study for the Breeding and Genetics Exam 1. Sharpen your skills with engaging questions, hints, and detailed explanations. Master key concepts and prepare to excel.

Multiple Choice

In the genetic value equation G = A + D + I, what does A represent?

Explanation:
Additive genetic effects—the sum of the average effects of alleles across the genome. These additive effects accumulate across loci and are the portion of the genotype that is transmitted from parents to offspring in a predictable way, making them the basis for breeding value and response to selection. The other terms represent non-additive genetic variation (dominance within a locus and epistasis between loci) and environmental factors that influence the phenotype but are not part of the additive genetic value.

Additive genetic effects—the sum of the average effects of alleles across the genome. These additive effects accumulate across loci and are the portion of the genotype that is transmitted from parents to offspring in a predictable way, making them the basis for breeding value and response to selection. The other terms represent non-additive genetic variation (dominance within a locus and epistasis between loci) and environmental factors that influence the phenotype but are not part of the additive genetic value.

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