Klinefelter's syndrome has number of chromosomes

Options

A. 47
B. 46
C. 45
D. 44

Answer

**Step-by-Step Solution:**

1. **Understanding Klinefelter's Syndrome**: Klinefelter's syndrome is a genetic condition that affects males. It is caused by an extra X chromosome.

2. **Normal Male Chromosome Count**: A typical male has 46 chromosomes in total, which includes 44 autosomes and 2 sex chromosomes (one X and one Y). This can be represented as:
- Total = 44 autosomes + 1 X + 1 Y = 46 chromosomes.

3. **Chromosome Count in Klinefelter's Syndrome**: In males with Klinefelter's syndrome, there is an additional X chromosome. Therefore, the chromosome count changes to:
- Total = 44 autosomes + 2 X + 1 Y = 47 chromosomes.

4. **Conclusion**: Thus, a male with Klinefelter's syndrome has a total of 47 chromosomes, which is one more than the normal count of 46.

5. **Final Answer**: The number of chromosomes in Klinefelter's syndrome is 47.