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Question: Answered & Verified by Expert
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?
BiologyPrinciples of Inheritance and VariationNEETNEET 2019 (Odisha)
Options:
  • A Thalassemia
  • B Klinefelter's syndrome
  • C Phenylketonuria
  • D Turner's syndrome
Solution:
1332 Upvotes Verified Answer
The correct answer is: Klinefelter's syndrome
Klinefelter's syndrome is a genetic condition in which each cell in the affected person has three sex chromosomes XXY. It is caused due to the presence of an additional copy of X-chromosome resulting into a karyotype of $47, \mathrm{XXY}$. Such individuals are sterile.

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