Principle-Of-Inheritance-And-Variation Question 618

Question: Given is : X is the chromosome with gene for haemophilia and X is the chromosome with normal gene. Which of the following individuals will act as carrier for haemophilia [MP PMT 1992]

Options:

A) $ X^{h}Y $

B) $ XY $

C) $ X^{h}X^{h} $

D) $ X^{h}X $

Show Answer

Answer:

Correct Answer: D

Solution:

When both the chromosomes bear genes for disease i.e.

in homozygous condition, only then the character will be expressed otherwise the individual will act as a carrier.