Multiple choice The process of two genotypic interaction at two different locii is termed as Incomplete dominance Co-dominance Epistasis Multiple alleles Reveal answer Fill a bubble to check yourself C Correct answer Explanation Epistasis is an interaction between genotypes at two different gene loci, which sometimes resembles a dominance interaction at a single locus. Epistasis modifies the characteristic 9:3:3:1 ratio expected for two non-epistatic genes.