In summer squash, fruit color follows a model of dominant ep…
In summer squash, fruit color follows a model of dominant epistasis with a classic 12:3:1 ratio. A dominant inhibitor allele (W) blocks the conversion of a white compound into a green intermediate. Downstream, a dominant allele (Y) converts green into yellow. If a plant has the genotype WwYy, what is its phenotype, and what would happen if you crossed it with a homozygous recessive plant (wwyy)?