Homologous chromosomes segregate during :

Options

A. fertilization
B. meiosis
C. meiosis II
D. mitosis

Answer

To determine when homologous chromosomes segregate, we need to analyze the processes of cell division involved.

### Step-by-Step Solution:

1. **Understanding Chromosomes**:
- Chromosomes are structures within cells that contain DNA. They exist in pairs called homologous chromosomes, where one chromosome comes from each parent.

2. **Identifying the Process**:
- The question asks about the segregation of homologous chromosomes. This occurs during a specific type of cell division.

3. **Types of Cell Division**:
- There are two main types of cell division: **Mitosis** and **Meiosis**.
- Mitosis is responsible for somatic (body) cell division, producing two identical daughter cells.
- Meiosis is a specialized form of cell division that produces gametes (sperm and eggs) and involves two rounds of division: Meiosis I and Meiosis II.

4. **Meiosis I vs. Meiosis II**:
- In **Meiosis I**, homologous chromosomes pair up and then segregate into two different cells. This is where the separation of homologous chromosomes occurs.
- In **Meiosis II**, the sister chromatids of each chromosome are separated, similar to what happens in mitosis.

5. **Conclusion**:
- Since the question specifically asks about the segregation of homologous chromosomes, the correct answer is **Meiosis I**.

### Final Answer:
- **Homologous chromosomes segregate during: B) Meiosis.**