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

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

• A. CcaXw+Xw-e
• B. CCXw-eY
• C. CcaXw-eY
• D. CcaXw-eXw-e

Answer: (B)

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

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