In fruit flies, the color of the eyes is sex linked (on the X chromosome). Complete the cross of the flies in the image to determine the possible offspring produced. (Homozygous white eyed female x red eyed male)
Red eyes are dominant (R), White eyes are recessive (r).
What percentage of the male offspring are expected to have red eyes?
In the given cross, the female fly is homozygous for the recessive white eye allele (rr), and the male fly has red eyes (R). Since the color of the eyes is sex-linked and located on the X chromosome, the male offspring will inherit the eye color from their mother.
Since the female fly is homozygous for the white eye allele (rr), all of her offspring will receive one copy of the recessive white eye allele. Therefore, all male offspring produced in this cross will have red eyes (Rr).
Hence, 100% of the male offspring are expected to have red eyes.