A man with extra X-chromosome suffers from

Options

A. Down's syndrome
B. Klinefelter 's syndrome
C. Bleeder's disease
D. Turner,'s syndrome.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about a man who has an extra X chromosome. This indicates a genetic condition related to sex chromosomes.

2. **Analyzing the Options**:
- **Option A: Down's syndrome**: This condition is caused by an extra chromosome 21, not related to the X chromosome.
- **Option B: Klinefelter syndrome**: This condition occurs when a male has an extra X chromosome (XXY instead of XY). It is characterized by symptoms such as reduced testosterone levels, infertility, and physical traits like taller stature.
- **Option C: Bleeder's disease**: This refers to bleeding disorders, which are not specifically linked to the presence of an extra X chromosome.
- **Option D: Turner syndrome**: This condition affects females and is caused by the absence of one X chromosome (45,X instead of 46,XX). It does not apply to males.

3. **Identifying the Correct Answer**: Based on the analysis, the only option that describes a condition related to a male with an extra X chromosome is Klinefelter syndrome.

4. **Conclusion**: Therefore, the correct answer is Klinefelter syndrome.

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