Question

94.In cats, the genes controlling coat-colour are co-dominant
(incompletely dominant) and are carried on the X chromosomes.
When a black female was mated with a ginger male the resulting
litter consisted of black male and tortoise-shell female kittens.
B.
What phenotypic ratio would be expected in the F2 generation?
A. 1 black male: 1 ginger male: 2 tortoise-shell females
1 black male: 1 ginger male: 1 tortoise-shell female: 1
black female
C. 2 black males: 1 tortoise-shell female: 1 ginger female
D. 1 black male: 1 tortoise-shell female: 1 ginger female: 1
black female
E. 2 black males: 1 tortoise-shell female: 1 black female
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Answer 1

Answer:

female

D. 1 black male: 1 tortoise-shell female: 1 ginger female: 1

black female

E. 2 black males: 1 tortoise-shell