NEET Biology question

Male XX and female XY sometimes occur due to

(A)Deletion
(B)Transfer of segments in X and Y chromosomesCorrect
(C)Aneuploidy
(D)Hormonal imbalance

Answer: (B)

Solution

Rare cases of XX males and XY females occur when the sex-determining region (the SRY gene, normally on the Y chromosome) is translocated onto the X chromosome during an aberrant crossover event, or is lost/altered on the Y chromosome — i.e., a translocation/transfer of chromosomal segments between X and Y

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Question ID VK-120206