Number of recombination nodules is relatively more in

Options

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

Answer

To determine the stage of meiosis where the number of recombination nodules is relatively more, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Recombination Nodules**:
- Recombination nodules are multi-component, proteinaceous structures associated with the synaptonemal complex during meiosis. They play a critical role in the process of genetic recombination.

2. **Identifying the Stages of Meiosis**:
- Meiosis consists of several stages, particularly during prophase I, which includes leptotene, zygotene, pachytene, diplotene, and diakinesis.

3. **Analyzing Each Stage**:
- **Leptotene**: Chromosomes begin to condense, and the synaptonemal complex starts to form, but recombination nodules are not yet prominent.
- **Zygotene**: Homologous chromosomes begin to pair, and some recombination nodules may be present, but they are not at their peak.
- **Pachytene**: This is the stage where recombination nodules are most abundant. During this stage, homologous chromosomes are fully paired, and recombination nodules are formed at the sites of crossing over.
- **Diplotene**: The synaptonemal complex begins to disassemble, and the number of recombination nodules decreases.
- **Diakinesis**: Chromosomes condense further, and the recombination nodules are still present but are fewer compared to the pachytene stage.

4. **Conclusion**:
- Based on the analysis, the stage where the number of recombination nodules is relatively more is the **pachytene stage** of prophase I.

### Final Answer:
The number of recombination nodules is relatively more in **pachytene**.

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