complementary genes Mutant alleles at different loci which complement one another to give a wild-type phenotype. Dominant complementarity occurs where the dominant alleles of two or more genes are required for the expression of a particular trait. Recessive complementarity is the case of suppression of a particular trait by the dominant allele of either gene, so that only the homozygous double recessive displays the trait.

complementary genes Mutant alleles at different loci which complement one another to give a wild-type phenotype. Dominant complementarity occurs where the dominant alleles of two or more genes are required for the expression of a particular trait. Recessive complementarity is the case of suppression of a particular trait by the dominant allele of either gene, so that only the homozygous double recessive displays the trait.

complementary genes Two (or more) genes that are interdependent, such that the dominant allele from either gene can only produce an effect on the phenotype of an organism if the dominant allele from the other gene is also present.