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 will the ratio of white to yellow to green fruit be in a cross between two double heterozygous plants (ccgg x ccgg)

12 white: 3 yellow: 1 green

Explanation:

As per given information, the dominant allele "C" is dominant and gives white fruits. The allele for the white color is also dominant over yellow and green phenotypes. Hence, in the given cross between CcGg x CcGg, all the genotypes with C---(having at least one copy of dominant "C") will have white fruits. The genotypes with ccG-(no dominant "C" and at least one "G") will have yellow fruits. The genotype with all recessive alleles would bear green fruits.

The ratio of white to yellow to green fruit be in a cross between two double heterozygous plants would be 12:3:1.