A colourblind man marries a normal vision woman whose father was colourblind. They have a first child as a son. What are the chances that a child would be colourblind?

Question

A colourblind man marries a normal vision woman whose father was colourblind. They have a first child as a son. What are the chances that a child would be colourblind?, 25%, 50%, 100%, 0%

MARKS App · Accepted Answer

Clour blindness is X linked genetic recessive disorder in which a carrier female passes its X- linked recessive gene to 50% of its male progeny and 50% male progeny are normal.

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