Principles of Inheritance and Variation Question 201

201. A colour blind mother and normal father would have

[1994]

(a) colour blind sons and normal/carrier daughters

(b) colour blind sons and daughters

(c) all colour blind

(d) all normal

Show Answer

Answer : a

Hints & Solution

(a) When a colour blind woman marries a normal man, the recessive homozygous gene is expressed in sons whereas the daughters become carriers.