Final answer:
During Telophase, chromosomes decondense into chromatin, new nuclear membranes form, and the cell prepares to split into two through cytokinesis.
Step-by-step explanation:
When the nuclear membrane reforms and the DNA loosely coils into chromatin, this stage is called Telophase. Telophase is the stage in mitosis when the chromosomes that have reached the opposite poles of the cell begin to decondense, transitioning from a tightly coiled state to the more relaxed, extended chromatin configuration. During telophase, new nuclear membranes form around the chromosomes, nucleosomes appear within the nuclear area, and the mitotic spindles are depolymerized to be reused in assembling cytoskeletal components for each daughter cell.
This stage marks the end of mitosis, with cytokinesis to follow, which will complete the division of one cell into two genetically identical daughter cells.