Answer:
C. 1/2
Explanation:
I took the test and got it right.
Im not sure if this is right or not but i think it might be C.
Hope its right!!!!
Thomas Hunt Morgan, who studied fruit flies, provided the first strong confirmation of the chromosome theory. Morgan discovered a mutation that affected fly eye color. ... Based on the inheritance pattern, Morgan concluded that the eye color gene must be located on the X chromosome.
try it first then do it over again until it works