Principles of Inheritance and Variation Question 189

189. Red-green colour blindness in humans is governed by a sex-linked recessive gene. A normal woman whose father was colour blind marries a colour blind man. What proportion of their daughters is expected to be colourblind?

(a) $3 / 4$

(b) $1 / 2$

(c) $1 / 4$

(d) All

Show Answer

Answer : b

Hints & Solution

(b) Normal woman whose father was colour blind would have received the $X$ chromosome from her father $(X^{C} Y) \to$



NCERT Chapter Video Solution

Dual Pane