Which of the following disorder is seen in human female only ?

Options

A. Turner's syndrome
B. Down's syndrome
C. Haemophilia
D. Klinefelter's syndrome

Answer

### Step-by-Step Text Solution:

1. **Understanding the Question**: The question asks which disorder is seen exclusively in human females. This means we need to identify a disorder that does not occur in males.

2. **Analyzing the Options**:
- **Turner Syndrome**: This is characterized by the presence of a single X chromosome (X chromosome monosomy). It occurs only in females.
- **Down Syndrome**: This condition is caused by trisomy of chromosome 21. It can occur in both males and females.
- **Hemophilia**: This is an X-linked recessive disorder primarily affecting males. Females can be carriers but are rarely affected.
- **Klinefelter Syndrome**: This disorder occurs in males who have an extra X chromosome (XXY).

3. **Identifying the Correct Disorder**: Based on the analysis:
- Turner Syndrome is the only disorder that occurs exclusively in females.
- Down Syndrome, Hemophilia, and Klinefelter Syndrome can occur in males.

4. **Conclusion**: Therefore, the disorder seen in human females only is **Turner Syndrome**.

### Final Answer: Turner Syndrome

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