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?
a. 100%
b. 75%
c. 50%
d. 25%
e. 0%
Since the color of the eyes in fruit flies is sex-linked, the male offspring will inherit the eye color from their mother (the female), as they receive their X chromosome from their mother. In this case, the female is homozygous for the recessive white eye allele (rr) and the male is red-eyed (R).
All of the male offspring will inherit the white eye allele from their mother, so they will have white eyes. Therefore, the percentage of male offspring expected to have red eyes is 0%.
Option e. 0%