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 (i.e., with genotype gg), the fruit color is green. What are the F₂ phenotypes and proportions expected from inter crossing the progeny of CC GG and cc gg plants? Assume that the C and G genes assort independently.