additive gene action


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additive gene action

[¦ad·ə·div ¦jēn ‚ak·shən]
(genetics)
A form of allelic interaction in which dominance is absent, resulting in a heterozygote that is intermediate in phenotype between homozygotes for the alternative alleles.
The cumulative contribution made by all loci in a group of nonallelic genes to a polygenic trait.