Recombinase enzyme is involved in which phase of meiosis :

Options

A. Pachytene
B. Diplotene
C. Diakinesis
D. Zygotene

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which phase of meiosis involves the recombinase enzyme.

2. **Identify the Phases of Meiosis**: Meiosis consists of several phases:
- Prophase I (which includes sub-stages: Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis)
- Metaphase I
- Anaphase I
- Telophase I
- Meiosis II (which also has similar phases)

3. **Focus on Prophase I**: The recombinase enzyme is primarily active during Prophase I of meiosis, specifically during the Pachytene stage.

4. **Pachytene Stage**: During the Pachytene stage, homologous chromosomes undergo a process called crossing over, where segments of DNA are exchanged between chromatids. This is where the recombinase enzyme plays a crucial role in facilitating this exchange of genetic material.

5. **Evaluate Other Options**:
- **Diplotene**: This stage follows Pachytene and is characterized by the separation of homologous chromosomes, not the exchange of genetic material.
- **Diakinesis**: This is the final stage of Prophase I where chromosomes condense further and prepare for metaphase, but no crossing over occurs here.
- **Zygotene**: This is the stage where homologous chromosomes begin to pair, but crossing over has not yet occurred.

6. **Conclusion**: The recombinase enzyme is involved in the Pachytene phase of meiosis, where crossing over takes place.

**Final Answer**: The recombinase enzyme is involved in the Pachytene phase of meiosis.

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