What is the final phase of mitosis where chromosomes begin to uncoil, spindles break down, and a new nuclear membrane forms?

The final phase of mitosis is characterized by several key processes that signal the conclusion of nuclear division. During this phase, chromosomes that are tightly coiled and condensed during earlier stages begin to uncoil, which allows them to return to their less dense form, making it easier for the cell to access the genetic information encoded within them.

In addition to the uncoiling of chromosomes, the spindle apparatus, which is responsible for separating sister chromatids and moving them to opposite poles of the cell, starts to break down. This disassembly is crucial because it signifies the end of the separation of genetic material.

Another crucial event occurring in this phase is the reformation of the nuclear membrane around each set of chromosomes. This leads to the establishment of two distinct nuclei in what will eventually become two separate daughter cells.

These processes collectively indicate that the cell is completing the division of its genetic material and preparing for the final stage of cell division, which follows mitosis and is known as cytokinesis, where the rest of the cell divides.

The other stages of mitosis — prophase, anaphase, and metaphase — focus on different aspects of chromosome alignment and separation, rather than the reformation of the nuclear envelope and the decondensation of chromosomes