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additive gene action

A Dictionary of Genetics

Robert C. King,

William D. Stansfield,

Pamela K. Mulligan

additive gene action 

1. a form of allelic interaction in which dominance is absent; the heterozygote is intermediate in phenotype between homozygotes for the alternative alleles. 2. the cumulative contri-bution made by all loci (of the kind described above) to a polygenic trait.

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