Synapsis occurs between :

Options

A. Two homologous chromosomes
B. A make and a female gamete
C. m RNA and ribosomes
D. Spindle fibres and centromere

Answer

**Step-by-Step Solution:**

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

2. **Identifying Homologous Chromosomes**: Homologous chromosomes are pairs of chromosomes that have the same structure and carry the same genes, but may have different alleles (variations of a gene).

3. **Role of Synapsis in Meiosis**: During synapsis, homologous chromosomes come together and align closely. This pairing is essential for the next steps in meiosis, including crossing over.

4. **Crossing Over**: While in synapsis, segments of non-sister chromatids (the chromatids of the homologous chromosomes) can exchange genetic material. This process is known as crossing over and increases genetic diversity.

5. **Conclusion**: Given the options provided in the question, synapsis occurs specifically between homologous chromosomes. Therefore, the correct answer is that synapsis occurs between two homologous chromosomes.

**Final Answer**: Synapsis occurs between two homologous chromosomes.

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