And the protein goes on to the second locus and either inhibits or expresses the protein that is coded by these purple genes here. So allele pair number one, allele pair number two at a different locus. And so now the protein produced can either go on and either inhibit or express other alleles, or it can go on to actually express that single trait. So this is what we mean by epistasis in plyotropy. It's a single locus, a single set of allele pair that basically expresses many different types of traits. But an epistasis, it's the interaction between different allele pairs at different loci that ultimately produces or expresses or controls the expression of a single trait.