Syndrome in which somatic cells contins three sex chromosomes XXY is

Options

A. Turner's syndrome
B. Down 's syndrome
C. Klinefelter's syndrome
D. Super female

Answer

**Step-by-Step Solution:**

1. **Identify the Chromosomal Composition**: The question states that the somatic cells contain three sex chromosomes, specifically XXY. This indicates the presence of two X chromosomes and one Y chromosome.

2. **Review the Options**: The options provided are Turner syndrome, Down syndrome, Klinefelter syndrome, and superfemales. We need to analyze each option to determine which one corresponds to the XXY chromosomal configuration.

3. **Analyze Turner Syndrome**: Turner syndrome is characterized by the presence of only one X chromosome (X0). Since the question specifies XXY, Turner syndrome is not the correct answer.

4. **Analyze Down Syndrome**: Down syndrome is caused by an extra copy of chromosome 21 (trisomy 21), which is unrelated to sex chromosomes. Therefore, this option is also incorrect.

5. **Analyze Klinefelter Syndrome**: Klinefelter syndrome is a condition that occurs in males who have an extra X chromosome, resulting in the chromosomal pattern XXY. This matches the description given in the question.

6. **Analyze Superfemales**: Superfemales, or triple X syndrome, refers to females who have three X chromosomes (XXX). This does not match the XXY configuration, making this option incorrect as well.

7. **Conclusion**: Based on the analysis, the correct answer to the question is Klinefelter syndrome, which is characterized by the presence of three sex chromosomes (XXY).

**Final Answer**: Klinefelter syndrome.

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