Question

A colour blind man $\left(X^{C}Y\right)$ has a colour blind sister $\left(X^C{X}^C\right)$ and a normal brother (XY). What is genotype of father and mother.

• A. $X^{C}Y,X^C{X}^C$
• B. $X^{C}Y,X^{C}X$
• C. $XY,X^C{X}^C$
• D. $XY,X^{C}X$

Answer 1

Answer: (B)

$X^{C}Y,X^{C}X$

Father would be colour blind and mother would be normal.

So, the correct answer is '$X^{c}Y,X^{c}X$'.