Principles of Inheritance and Variation Question 113
113. Both husband and wife have normal vision though their fathers were colour blind. The probability of their daughter becoming colour blind is
[1990]
(a) $0 %$
(b) $25 %$
(c) $50 %$
(d) $75 %$
Show Answer
Answer : a
Hints & Solution
(a) The probability of the daughter becoming colour blind arises only when the father is also colour blind. Husband - XY Wife $-XX^{C}$ (wife is carrier because her father is colour blind) So, probability of their daughter becoming colour blind is $0 %$.
