epistatic interactions

complementary gene interaction

2 dominant genes required for dominant phenotype

duplicate gene actions

just 1 dominant gene from either parent leads to dominant phenotype

dominant gene interaction

different combos leads to different phenotypes

recessive epistasis

one recessive gene masks other alleles

dominant epistasis

Dominant allele of one gene masks other alleles

dominant suppression

the more dominant gene inhibits all other genes. The other phenotypes will be expressed only if the inhibitor is missing