Which F1 genotype corresponds to a male with light eosin eyes from a cross of specific fly genotypes?

In the context of Drosophila genetics, light eosin eye color is typically indicative of a specific genetic makeup that can be understood through the examination of the alleles involved. The alleles in question often include different variants associated with eye colors, such as the C (color) and Xw (white) alleles.

To determine the F1 genotype of a male with light eosin eyes, one must analyze the combinations of the alleles present. The genotype B, which is CCXw-eY, signifies that the male has two dominant C alleles, which contribute to eye color (meaning it expresses a visible characteristic) and a single Y chromosome. The presence of Xw-e indicates that this male is a holder of one allele associated with eye pigmentation, which aligns with the observed phenotype of light eosin eyes.

Males in Drosophila have one X and one Y chromosome, and since eye color is often linked to genes carried on the X chromosome, the presence of alleles such as Xw-e is crucial in determining the eye color phenotype. The combination of two C alleles ensures that the light eosin coloring manifests properly due to the gene's dominance over other less expressive variants. This genotype is thus