Question

Predict the Phenotype and Genotype of F1 & F2 generation of two Drosophila (fruit flies), which has Grey body with Yellow eyes and White body with red eyes respectively.

Answer 1

For genetics studies, it is important to know which alleles are present on each homologous chromosome—that is, the genotype. ... If, however, the fruit fly has the purple-eye allele on one chromosome and the normal, red-eye allele on its homologue, then it is heterozygous for eye color.