NEET Biology question

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is

(A)Autosomal dominant
(B)Autosomal recessive
(C)Sex-linked dominant
(D)Sex-linked recessiveCorrect

Answer: (D)

Solution

A phenotypically normal (unaffected) carrier female transmitting a disease specifically to some of her sons (but not uniformly to all offspring regardless of sex) is the hallmark of X-linked recessive inheritance, e.g., haemophilia, where a heterozygous carrier mother () passes the allele to 50% of her

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Question ID VK-120389