The exchange of genetic material between chromatids and homologous chromosomes occurs during -

Options

A. lnterphase
B. Mitosis and Meiosis
C. Prophase I
D. Anaphase I

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the stage in which genetic material is exchanged between chromatids and homologous chromosomes. This process is crucial for genetic diversity during reproduction.

2. **Identifying the Process**: The exchange of genetic material occurs during a specific stage of meiosis, which is the type of cell division that produces gametes (sperm and eggs).

3. **Meiosis Overview**: Meiosis consists of two main stages: Meiosis I and Meiosis II. Each of these stages has several phases: prophase, metaphase, anaphase, and telophase.

4. **Focusing on Meiosis I**: The key stage for genetic material exchange is during Meiosis I, specifically in the first phase called prophase I.

5. **Prophase I Details**: During prophase I, homologous chromosomes pair up and can exchange genetic material through a process known as "crossing over." This results in genetic recombination, which increases genetic variation.

6. **Conclusion**: Therefore, the exchange of genetic material between chromatids and homologous chromosomes occurs specifically during prophase I of meiosis.

**Final Answer**: The exchange of genetic material between chromatids and homologous chromosomes occurs during **Prophase I** of meiosis.

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