Which of the following events occurs during telophase of mitosis?
Telophase is the final stage of mitosis, where the cell completes the division process and prepares for cytokinesis. This phase is crucial as it ensures that each daughter cell receives a complete set of chromosomes and organelles. In this article, we will explore the various events that take place during telophase of mitosis and their significance in cell division.
1. Chromosome Decondensation
One of the primary events during telophase is the decondensation of chromosomes. After the chromosomes have been pulled apart during anaphase, they start to unravel and return to their interphase state. This decondensation is essential for the chromosomes to be accessible for gene expression in the daughter cells.
2. Nuclear Membrane Reformation
During telophase, the nuclear membrane that was broken down during prophase re-forms around each set of chromosomes. This reformation is crucial for maintaining the integrity of the nuclear DNA and ensuring that the daughter cells have their own nucleus.
3. Nuclear Pores Formation
As the nuclear membrane reforms, nuclear pores also reappear. These pores allow for the exchange of molecules between the nucleus and the cytoplasm, such as RNA and proteins. The formation of nuclear pores during telophase is essential for the proper functioning of the daughter cells.
4. Cytokinesis Initiation
While telophase is primarily focused on nuclear events, cytokinesis, the division of the cytoplasm, also begins during this phase. In animal cells, a contractile ring forms around the equatorial plane of the cell, which eventually pinches the cell into two daughter cells. In plant cells, a cell plate forms between the two nuclei, which then develops into a new cell wall.
5. Spindle Fiber Disassembly
During telophase, the spindle fibers that were responsible for moving the chromosomes during mitosis disassemble. This disassembly is essential for the proper segregation of chromosomes and for the cell to return to its normal state.
In conclusion, telophase of mitosis is a critical phase that involves various events, including chromosome decondensation, nuclear membrane reformation, nuclear pores formation, cytokinesis initiation, and spindle fiber disassembly. These events ensure that each daughter cell receives a complete set of chromosomes and organelles, allowing for the proper functioning and growth of the cells.
