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Q.

A haemophilic man marries the normal daughter of a haemophilic man. Choose the correct statement w.r.t his progeny.

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a

All his daughters are affected.

b

All his sons are affected.

c

50% of his progeny is affected.

d

All his progeny is affected.

answer is C.

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Detailed Solution

Woman is carrier. So 50% of male offspring and 50% of female offspring are affected.

Haemophilic man - XCY

Woman may be a carrier as she is the daughter of a haemophilic man - XCX

Offspring - Colour blind daughter (XCXC) , Carrier daughter (XCX), Colourblind son (XCY), Normal son (XY)

50% of the progeny are affected (colour blind).

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