What happens when cytokinesis fails permanently after karyokinesis in mitosis?

Options

A. Cell remains same
B. Cell becomes coenocytic
C. Cell becomes free nuclear
D. Cell becomes dikaryotic

Answer

### Step-by-Step Solution:

1. **Understanding Mitosis**: Mitosis is a process of cell division that results in two identical daughter cells. It consists of two main phases: karyokinesis (division of the nucleus) and cytokinesis (division of the cytoplasm).

2. **Karyokinesis Completion**: In this scenario, karyokinesis has occurred successfully, meaning that the nucleus has divided into two separate nuclei.

3. **Cytokinesis Failure**: Cytokinesis is supposed to follow karyokinesis. If cytokinesis fails permanently, the cytoplasm does not divide, and the two nuclei remain within the same cell.

4. **Resulting Cell Condition**: Since the cell has two nuclei but has not divided into two separate cells, this condition is termed "coenocytic." A coenocytic cell contains multiple nuclei within a single cell mass.

5. **Conclusion**: Therefore, when cytokinesis fails permanently after karyokinesis, the result is a coenocytic cell, which has more than one nucleus in a single cytoplasmic mass.

### Final Answer:
When cytokinesis fails permanently after karyokinesis in mitosis, the cell becomes coenocytic, containing multiple nuclei within a single cell.

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