In fruit flies the gene for white eyes is sexlinked recessiv

In fruit flies, the gene for white eyes is sex-linked recessive. (R) is red and (r) is white. Cross a white-eyed female with a normal red-eyed male. e. What percent of the males will have red eyes? White eyes? f. What percent of the females will have red eyes? White eyes? g. What total percent of the offspring will be white-eyed? h. What percent of the offspring will be carriers of the white eye trait?

Solution

X^rX^r x X^RY

e) Total percent of males with red eyes = 0% & with white eyes = 100%

f) Total percent of females with red eyes = 100% & with white eyes = 0%

g) Percentage of offspings with white eyes = (100+0)/2 = 50%

h) Percentage of offsprings carrying white eyes trait = 50%

	Xr	Xr
XR	XRXr	XRXr
Y	XrY	XrY