Turner syndrome and Klinefelter syndrome are all related to

Options

A. both 'X' chromosomes and 'Y' chromosome
B. 'Y' chromosomes
C. 'X' chromosomes
D. neither 'X' chromosomes nor 'Y' chromosomes

Answer

To solve the question regarding Turner syndrome and Klinefelter syndrome, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Syndromes**:
- Turner syndrome is a condition that affects females, characterized by the absence of one X chromosome.
- Klinefelter syndrome affects males and is characterized by the presence of an extra X chromosome.

2. **Understand Chromosomal Composition**:
- In Turner syndrome, the chromosomal composition is typically represented as 45,X (monosomy), meaning there is only one X chromosome instead of the usual two.
- In Klinefelter syndrome, the chromosomal composition is represented as 47,XXY (trisomy), indicating the presence of an additional X chromosome.

3. **Determine the Chromosomal Abnormalities**:
- Turner syndrome involves the loss of one X chromosome, leading to a condition known as monosomy.
- Klinefelter syndrome involves the addition of an extra X chromosome, leading to a condition known as trisomy.

4. **Relate to Sex Chromosomes**:
- Both syndromes are related to the sex chromosomes (X and Y chromosomes).
- Turner syndrome is specifically related to the X chromosome due to its absence, while Klinefelter syndrome is related to the presence of an additional X chromosome.

5. **Choose the Correct Option**:
- Given the options: both X chromosomes and Y chromosome, Y chromosomes, X chromosomes, or neither X nor Y chromosome, the correct answer is that both syndromes are related to X chromosomes.

### Final Answer:
The correct answer is **X chromosomes** (Option C).

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