Synaptonemal complex is visible from which phase-

Options

A. Leptotene through diplotene
B. Pachytene through diplotene
C. Zygotene through pachytene
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding the Phases of Meiosis:**
- Meiosis consists of several phases, including Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis. Each phase has distinct characteristics related to chromosome behavior.

2. **Identifying the Leptotene Phase:**
- In the Leptotene phase, chromosomes begin to condense and become visible, but homologous chromosomes do not yet pair.

3. **Recognizing the Zygotene Phase:**
- During the Zygotene phase, homologous chromosomes start to pair up. This pairing is crucial for the formation of the synaptonemal complex.

4. **Formation of the Synaptonemal Complex:**
- The synaptonemal complex is a protein structure that forms between homologous chromosomes during the Zygotene phase. It facilitates the pairing of homologous chromosomes and the formation of a tetrad.

5. **Conclusion:**
- The synaptonemal complex becomes visible at the end of the Zygotene phase. Therefore, the answer to the question is that the synaptonemal complex is visible from the Zygotene phase.

**Final Answer:**
The synaptonemal complex is visible from the Zygotene phase.

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