A person with 47 chromosomes due to an additional Y-chromosome suffers from a condition called

Options

A. Down's syndrome
B. Super female
C. tuner's syndrome
D. klinefelter's syndrome

Explanation

To solve the question regarding the condition experienced by a person with 47 chromosomes due to an additional Y chromosome, we can follow these steps:

### Step-by-Step Solution

1. **Understand Chromosome Count**:
- Normally, humans have 46 chromosomes, consisting of 22 pairs of autosomes and one pair of sex chromosomes (XX for females and XY for males).
- The question states that the individual has 47 chromosomes, indicating an abnormality.

2. **Identify the Additional Chromosome**:
- The individual has an additional Y chromosome, making the chromosomal composition XXY.
- This indicates that the person has one extra Y chromosome in addition to the usual X and Y chromosomes.

3. **Determine the Condition**:
- The condition associated with an extra X chromosome in males (XXY) is known as Klinefelter syndrome.
- Klinefelter syndrome is characterized by the presence of an extra sex chromosome in males, leading to various physical and developmental features.

4. **Eliminate Other Options**:
- **Down syndrome** is caused by an extra copy of chromosome 21, not related to the Y chromosome.
- **Superfemales** (also known as Triple X syndrome) occur when there are three X chromosomes (XXX), not involving a Y chromosome.
- **Turner syndrome** occurs in females with only one X chromosome (45, X) and is not related to the presence of a Y chromosome.

5. **Conclusion**:
- Based on the analysis, the condition experienced by the individual with 47 chromosomes due to an additional Y chromosome is Klinefelter syndrome.

### Final Answer:
The correct answer is Klinefelter syndrome.