A) None of their daughters are colour blind
B) All the sons are colour blind
C) All the daughters are colour blind
D) Half of their sons are colour blind
Correct Answer: D
Solution :
Since daughter of a colourblind person will be a carrier of the disease and only one of the two X chromosomes will bear the recessive gene for disease, so half of their sons will be colourblind.You need to login to perform this action.
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