Color of fruits in summer squash is determined by two genes. Allele Y (dominant) of the first gene determines the yellow color, while alleley (recessive) determines the green color. These two colors can develop only if a recessive allelew of the second gene is also present. If a dominant allele W of this gene is present, the color of fruits is always white. What phenotypes and in what proportions will be produced in a cross of two double heterozygous plants (Yy Ww X Yy Ww)? please show your work.