alleryIn haemophilia, an unaffected carrier female may
Adevelop the disease herself always
Bpass it only to her daughters
Ctransmit the disease to her sons
Dcure it in the next generation
Answer & Solution
Correct answer: C. transmit the disease to her sons
1. Haemophilia is a sex linked recessive condition.
2. A female carrying one defective copy is usually unaffected herself.
3. She may still transmit the disease to her sons.
4. A son inherits only one X, so a single defective copy is enough to express it.
5. This inheritance pattern is why the pedigree skips generations on the female side.
_Source: syllabus Biology Ch4 'Principles of Inheritance and Variation'_
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