A) XX egg and Y from sperm
B) XX egg and XY sperm
C) X egg and XY sperm
D) Both [a] and [c]
Correct Answer: D
Solution :
[d] Both options [a] and [c] are correct. This can be explained as In Klinefelter's syndrome, the sex chromosomes genotype is XXY, i.e. there is one extra X-chromosome. This extra X can come in two conditions, when there is non-disjunction in egg, i.e. XX egg and Y sperm and where is non-disjunction in sperm, i.e. X egg and XY sperm.
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