NEET Biology question
A man and a woman, who do not show any apparent sign of a certain inherited disease, have seven children (two daughters and five sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?
Answer: (D)
Solution
Both unaffected parents producing only affected sons (never affected daughters) is the classic signature of X-linked recessive inheritance: the mother is an unaffected carrier () who passes the recessive allele to about half her sons (who, being hemizygous, show the disease),
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