What genotype will yield a female progeny with cream eye color from a mating of two specific fly strains?

What genotype will yield a female progeny with cream eye color from a mating of two specific fly strains?

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

Answer: (B)

The genotype that results in a female progeny with cream eye color from the specified mating is accurately identified as B, which is caca Xw-eXw-e. In Drosophila melanogaster, commonly known as fruit flies, eye color is a trait influenced by specific alleles. The "c" allele represents a mutation that leads to cream-colored eyes, while "w" signifies a white eye color variant and is located on the X chromosome. Female flies have two X chromosomes, which is critical for expressing the cream eye color phenotype. In the given genotype caca Xw-eXw-e, the two "cac" alleles denote an individual with the homozygous recessive condition for cream eyes, while the presence of two Xw-e alleles indicates the female's genotype carries the gene for cream eyes. Therefore, any female progeny who inherits these alleles will express the cream eye color, as the recessive trait (cream) is being expressed in the absence of a dominant trait. Such a combination is necessary because males have one X chromosome and one Y chromosome, so for cream eye color to manifest in female flies, they must inherit the respective alleles in a homozygous manner (both alleles

The genotype that results in a female progeny with cream eye color from the specified mating is accurately identified as B, which is caca Xw-eXw-e.

In Drosophila melanogaster, commonly known as fruit flies, eye color is a trait influenced by specific alleles. The "c" allele represents a mutation that leads to cream-colored eyes, while "w" signifies a white eye color variant and is located on the X chromosome. Female flies have two X chromosomes, which is critical for expressing the cream eye color phenotype.

In the given genotype caca Xw-eXw-e, the two "cac" alleles denote an individual with the homozygous recessive condition for cream eyes, while the presence of two Xw-e alleles indicates the female's genotype carries the gene for cream eyes. Therefore, any female progeny who inherits these alleles will express the cream eye color, as the recessive trait (cream) is being expressed in the absence of a dominant trait.

Such a combination is necessary because males have one X chromosome and one Y chromosome, so for cream eye color to manifest in female flies, they must inherit the respective alleles in a homozygous manner (both alleles