NEET Biology question

Klinefelter's syndrome results from

(A)XX egg of Y spermCorrect
(B)XX egg and XY sperm
(C)X egg and YY sperm
(D)XY egg and X sperm

Answer: (A)

Solution

Klinefelter's syndrome has the genotype XXY, arising when non-disjunction of the X chromosome during oogenesis produces an egg carrying two X chromosomes (XX egg), which is then fertilized by a normal Y-bearing sperm, giving the

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Question ID VK-120093