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4.Principles of Inheritance and Variation
medium
Haemophilic female marries normal male, the theoretical ratio of their offsprings regarding haemophilia will be
A
All offsprings are haemophilic
B
All girls are haemophilic
C
All sons are haemophilic
D
Half daughters and half sons are haemophilic
Solution
(c)All sons are haemophilic because this disease caused by $X$-linked mutant gene.
Standard 12
Biology