Complex structure formed during synapsis is called

Answer

**Step-by-Step Text Solution:**

1. **Understanding Synapsis**: Synapsis is a crucial process that occurs during meiosis, specifically during prophase I. It involves the pairing of homologous chromosomes.

2. **Formation of the Complex**: During synapsis, two homologous chromosomes (each consisting of sister chromatids) come together to form a complex structure. This process is essential for the exchange of genetic material.

3. **Identification of the Complex**: The complex that is formed during synapsis is known as the **synaptonemal complex**. This structure facilitates the alignment and exchange of genetic information between the homologous chromosomes.

4. **Phase of Occurrence**: The formation of the synaptonemal complex occurs during the **zygotene phase**, which is the second phase of prophase I in meiosis.

5. **Significance of the Complex**: The synaptonemal complex plays a vital role in promoting genetic variation. It allows for the exchange of genetic material between sister chromatids, which is a key feature of sexual reproduction.

6. **Conclusion**: Therefore, the complex structure formed during synapsis is called the **synaptonemal complex**.

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