A) All sons and daughters haemophilic and colourblind
B) Haemophilic and colourblind daughters
C) 50% haemophilic colourblind sons and 50% haemophilic sons
D) 50% haemophilic daughters and 50% colour blind daughters
Correct Answer: C
Solution :
Haemophillia and colour blindness both are recessive X-linked traits. They express in males when present in single copy (heterozygous) but in females, they express only when present in homozygous condition. Results: (a) 50% sons are colourblind and haemophilic. (b) 50% sons are haemophilic only. (c) 50% daughters are carrier for colour blindness and haemophilia. (d) 50% daughters are carrier for haemophilia only.You need to login to perform this action.
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