What is site of crossing over called?

Explanation

**Step-by-Step Solution:**

1. **Understanding Crossing Over**: Crossing over is a process that occurs during meiosis, which is the type of cell division that leads to the formation of gametes (sperm and eggs). It involves the exchange of genetic material between homologous chromosomes.

2. **Identifying the Stage of Meiosis**: Crossing over specifically occurs during the prophase stage of meiosis, particularly in prophase I. This is when homologous chromosomes pair up and exchange segments of their genetic material.

3. **Focusing on the Diplotene Stage**: Within prophase I, there are several stages, and crossing over is most prominently observed during the diplotene stage. This is the stage where the chromosomes become visible and the exchange of genetic material can be seen.

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