semidominant

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semidominant

adjective Referring to the phenotypic effect of a particular allele on another allele with respect to a given trait. Allele A is said to be semidominant with respect to allele a if the A/A homozygote has a mutant phenotype and the A/a heterozygote has a less severe phenotype, while the a/a homozygote is wild-type.
References in periodicals archive ?
Three semi-dominant hsp70-1shou5 alleles were identified as suppressors in fei1fei2 background.
Extremely powerful as it was, the criollo class was nevertheless only semi-dominant as it had to share power with the Spanish Crown and Spanish newcomers.
It's a textbook case of a semi-dominant gene," says Menaker.