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Klinefelter's syndrome is denoted by :...

Klinefelter's syndrome is denoted by :

A

44 + XXY

B

44 + XO

C

44 + XXX

D

44 + YY

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Klinefelter's Syndrome**: Klinefelter's syndrome is a genetic condition that affects males. It is characterized by the presence of an extra X chromosome. 2. **Normal Male Genotype**: A typical male has a genotype of 44 autosomes and 1 X and 1 Y chromosome, which can be represented as 44 + XY. 3. **Klinefelter's Syndrome Genotype**: In Klinefelter's syndrome, the male genotype changes to 44 autosomes, 2 X chromosomes, and 1 Y chromosome. This can be represented as 44 + XXY. 4. **Identifying the Characteristics**: Males with Klinefelter's syndrome often exhibit some female-like characteristics, such as gynecomastia (breast tissue development) and infertility. 5. **Evaluating the Options**: - Option A states 44 autosomes + 2 X chromosomes + 1 Y chromosome (44 + XXY), which is correct. - Option B states 44 autosomes + 1 X chromosome, which is incorrect and corresponds to Turner’s syndrome. - Option C states 44 autosomes + 3 X chromosomes, which is incorrect and corresponds to a super female condition. - Option D states 44 autosomes + 2 Y chromosomes, which is also incorrect. 6. **Conclusion**: The correct answer is option A, which accurately describes the genetic makeup of an individual with Klinefelter's syndrome.
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