Syncytium formation takes place if

Options

A. Cytokinesis is not followed by karyokinesis
B. Karyokinesis does not occur
C. Karyokinesis is not followed by cytokinesis
D. Both karyokinesis and cytokinesis are prevented.

Answer

**Step-by-Step Solution:**

1. **Understanding Syncytium Formation**:
- A syncytium is a multinucleated cell that can result from the fusion of multiple cells or from incomplete cell division.

2. **Role of Karyokinesis and Cytokinesis**:
- Karyokinesis refers to the division of the nucleus during cell division.
- Cytokinesis is the process that follows karyokinesis, where the cytoplasm divides, resulting in two separate cells.

3. **Conditions for Syncytium Formation**:
- Syncytium formation occurs when karyokinesis happens without subsequent cytokinesis. This means that while the nucleus divides, the cytoplasm does not divide, leading to a cell with multiple nuclei.

4. **Evaluating the Options**:
- **Option A**: Cytokinesis is not followed by karyokinesis - Incorrect, as this does not lead to syncytium.
- **Option B**: Karyokinesis does not occur - Incorrect, as karyokinesis must occur for syncytium to form.
- **Option C**: Karyokinesis is not followed by cytokinesis - Correct, as this leads to the formation of a syncytium.
- **Option D**: Both karyokinesis and cytokinesis are prevented - Incorrect, as at least karyokinesis must occur for syncytium formation.

5. **Conclusion**:
- The correct answer is that syncytium formation takes place if karyokinesis is not followed by cytokinesis.

**Final Answer**: Syncytium formation takes place if karyokinesis is not followed by cytokinesis.

---