Final answer:
The ratio of genotypes in a cross between a white-eyed male and a female heterozygous for red eye color is 1:1.
Step-by-step explanation:
In a cross between a white-eyed male and a female heterozygous for red eye color, the ratio of offspring genotypes would be 1:1. The white-eyed male would contribute the genotype wY, and the female heterozygous for red eye color would contribute the genotypes Yy and yy. Therefore, half of the offspring would have the genotype wY Yy, and the other half would have the genotype wY yy.