What happens during Telophase of mitosis?

During telophase of mitosis, the critical event is the re-formation of the nuclear envelope around the separated sets of chromosomes. This process marks the conclusion of nuclear division. As the chromosomes reach the poles of the cell, they begin to de-condense, returning to a less compact chromatin state. The formation of the nuclear envelope is essential because it serves to protect the newly separated genetic material and prepares the cell for the next stage, which is cytokinesis.

In this phase, the cell transitions from the highly organized segregation of chromosomes to a more relaxed state where the genetic material is encased within its own nucleus, facilitating future functions of the daughter cells. The completion of this step is vital for maintaining the integrity of the genetic information during cell division.