Heritability of heterozygosity offers a new way of understanding why dominant gene action contributes to additive genetic variance.

Abstract excerpt

Whenever allele frequencies are unequal, nonadditive gene action contributes to additive genetic variance and therefore the resemblance between parents and offspring. The reason for this has not been easy to understand. Here, we present a new single-locus decomposition of additive genetic variance that may give greater intuition about this important result. We show that the contribution of dominant gene action to...

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