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Standard X
Biology
Inheritance of Red-Green Colour Blindness
What are all ...
Question

What are all the chances of colour blind daughter and sons being born in a marriage of normal man marrying a normal woman, whose father was colour blind?

A
All sons are normal and all daughters are colourblind.
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B
Both the sons and daughters are colourblind.
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C
All the sons are colourblind and all daughters are normal.
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D
50% sons are colourblind and all daughters are phenotypically normal.
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Solution

The correct option is D 50% sons are colourblind and all daughters are phenotypically normal.
Normal man - XC Y
Normal woman whose father is colour blind - XC Xc
Offsprings: XC XC (Normal), XC Xc (Normal), XC Y (Normal) and Xc Y (Colour blind)

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