Question

A colour blind mother and normal father would have

• A. colour blind sons and daughters
• B. colour blind sons and normal/carrier daughters
• C. all normal
• D. all colour blind

Answer 1

The correct option is B

colour blind sons and normal/carrier daughters

The correct option is B.

Explanation of correct option:

1. Color blindness is a type of disorder in which the person faces trouble in seeing or identifying certain colors like red, blue, and green.
2. They also have difficulties identifying the differences between color shades.
3. Color blindness is caused by genes located on the X chromosome.
4. It is a recessive disorder.
5. Males inherit one X chromosome from their mother.
6. So, the sons will be color blind if their mother is color blind.
7. Females inherit one X chromosome from each parent, so they will be carriers for the trait despite being phenotypically normal.

Table 1: Colorblind mother (X^cX^c) X normal father (XY)

Gametes	X	Y
Xc	XcX (Carrier daughter)	XcY (Color blind son)
Xc	XcX (Carrier daughter)	XcY (Color blind son)

Final answer: A color blind mother and normal father would have color-blind sons and normal/carrier daughters.