A) colour blind sons and normal/carrier daughters
B) colour blind sons and daughters
C) all colour blind
D) all normal
Correct Answer: A
Solution :
Colour blindness is a sex linked defect in which human beings are unable to distinguish red and green colour. The gene for colour blindness is located on X-chromosome. Therefore, a colour blind mother \[({{X}^{c}}{{X}^{c}})\] and normal father (XY) would have colour blind sons \[({{X}^{c}}Y)\] and carrier daughter x\[({{X}^{c}}X)\].
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