In an X-linked recessive disease, a affected woman married to a normal man, the percentage of affected daughters is:
Correct answer: A. 0%
- A. 0%
- B. 25%
- C. 50%
- D. 100%
Explanation
X chromosome comes from the female and X or Y comes from the man. if the man is normal then the disease will not express in the daughter.
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About X-linked Recessive Inheritance
X-linked recessive inheritance involves genes on the X chromosome, so males express a recessive allele with no corresponding allele on their single X chromosome, while females may be carriers. Pedigrees cover haemophilia and red-green colour blindness, including carrier mothers, affected sons and the absence of father-to-son transmission.
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