Question

Summer squash plants with the dominant allele C bear white fruit, whereas plants homozygous for the recessive allele c bear colored fruit. When the fruit is colored, the dominant allele G causes it to be yellow; in the absence of this allele (that is with genotype gg), the fruit color is green. What are the F₂ phenotypes and their genotypes and the phenotypic proportions expected from intercrossing the progeny of a cross between CC GG and cc gg plants? Assume independent assortment of the C and G genes.