What is Complementary genes

Complementary genes Mutant alle-les at different 'loci which complement one another to give a 'wild-type "pheno-type. 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.