If you can use any letters, it would have to be 2 lower case letters such as tt
Answer:
C. 100% of the offspring will be red-eyed and 100% of females will be carriers.
Explanation:
XR XR
Xr XRXr XRXr
Y XRY XRY
C) 100% of the offspring will be red-eyed, and 100% of the female offspring will be carriers.