You do a cross between two true-breeding strains of zucchini. One has green fruit, and the other has yellow fruit. The F1 plants are all green, but when these are crossed, the f2 plants consist of 9 green: 7 yellow. For each gene involved in the trait use letters as your symbols, starting with the letter A

a) what were the genotypes of the two parental strains(green and Yellow)?