Chiasmata can be distinctively seen in

Options

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

Answer

To answer the question "Chiasmata can be distinctively seen in," we will analyze the options provided and understand the stages of meiosis where chiasmata are observed.

### Step-by-Step Solution:

1. **Understand Chiasmata**:
- Chiasmata are the points of physical contact between homologous chromosomes during meiosis. They are crucial for genetic recombination and are formed during the process of crossing over.

2. **Identify the Stages of Meiosis**:
- Meiosis consists of several stages, including prophase I, which is further divided into sub-stages: leptotene, zygotene, pachytene, diplotene, and diakinesis.

3. **Analyze Each Option**:
- **Option A: Zygotene**: In this stage, homologous chromosomes begin to pair and form synapses, but chiasmata are not yet visible.
- **Option B: Pachytene**: This stage is characterized by the complete pairing of homologous chromosomes and crossing over occurs, but chiasmata are still not distinctly visible.
- **Option C: Diplotene**: During this stage, the synaptonemal complex begins to dissolve, and chiasmata become distinctly visible as the homologous chromosomes start to separate.
- **Option D: Diakinesis**: In this final sub-stage of prophase I, chiasmata may still be present, but they are not as distinctly visible as in diplotene.

4. **Conclusion**:
- Based on the analysis, chiasmata can be distinctly seen in **Option C: Diplotene**.

### Final Answer:
Chiasmata can be distinctively seen in **diplotene** stage of meiosis.

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