Question

R= red eyes; r= white eyes - parents are a homozygous white eyed female and a red eyed male

In fruit flies, the color of the eyes is sex linked (on the X chromosome). A cross of the flies in the image will produce



a
0% of the females with white eyes, 50% of the males with white eyes.
b
100% of the females with red eyes, 100% of the males with white eyes.
c
0% white eyed flies
d
50% red eyed flies

Answer 1

[AI-generated answer — Bot GPT 3.5]

The correct answer is b. 100% of the females will have red eyes, and 100% of the males will have white eyes. This is because the gene for eye color is located on the X chromosome, and females have two X chromosomes while males have one X and one Y chromosome. In this case, the female parent is homozygous for white eyes (rr) and the male parent has red eyes (R). Since the male only has one X chromosome, he will pass on his red eye allele to all of his daughters, resulting in 100% of the females having red eyes. On the other hand, the male parent will pass on his white eye allele to all of his sons, resulting in 100% of the males having white eyes.