Describe how the interaction of genes at the locus and between loci affect phenotypic variation.

Epistasis describes how gene interactions can affect phenotypes. Did you know that genes can mask each other's presence or combine to produce an entirely new trait? In his dihybrid crosses with pea plants, Gregor Mendel simultaneously examined two different genes that controlled two different traits.

Explanation:

please mark my answer in brainlist

i am going to guess that it is co2.