Which chromosome set represents a female child?

Options

A. XO
B. YO
C. XX
D. XY

Answer

To determine which chromosome set represents a female child, we can analyze the given options step by step:

1. **Examine the first option: XO**
- The XO chromosome set is typically associated with certain species, such as grasshoppers, where females have an XO configuration. However, in humans, this set does not represent a female.
- **Conclusion**: This option is incorrect.

2. **Examine the second option: YO**
- The YO chromosome set is not viable in humans. In fact, individuals with a YO configuration do not survive because they lack the necessary X chromosome.
- **Conclusion**: This option is also incorrect.

3. **Examine the third option: XX**
- The XX chromosome set is the standard configuration for females in humans. Each X chromosome carries important genetic information, and having two X chromosomes is what defines a female child.
- **Conclusion**: This option is correct.

4. **Examine the fourth option: XY**
- The XY chromosome set represents males in humans. The presence of a Y chromosome typically indicates male characteristics.
- **Conclusion**: This option is incorrect.

**Final Answer**: The chromosome set that represents a female child is **XX**.