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A colour blind mother and normal father would have

1. colour blind sons and normal/carrier daughters
2. colour blind sons and daughters
3. all colour blind
4. all normal

Correct answer: colour blind sons and normal/carrier daughters

Solution

Colour blindness is typically X-linked recessive. A colour blind mother must be XcXc, and a normal father is XCY, so all sons get Xc from mom and Y from dad, making them colour blind, while all daughters get Xc from mom and XC from dad, making them normal carriers.

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