Biology · Chromosomal Disorders
Klinefelter syndrome is a chromosomal disorder found in human populations. What is the underlying genetic cause of this condition?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Trisomy of chromosome 21 (47, XX/XY +21)
- 2An extra X chromosome in males (47, XXY)✓
- 3An extra Y chromosome (47, XYY)
- 4Absence of one X chromosome (45, XO)
Correct answer
An extra X chromosome in males (47, XXY)
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