Final answer:
Mitosis is a crucial process where the nucleus of a cell divides, leading to cell division, ensuring both daughter cells are genetically identical and maintain the diploid number of chromosomes for proper cell function and hereditary information.
Step-by-step explanation:
In mitosis, the nucleus of a cell divides in a series of steps to ensure that the cell division process results in two genetically identical daughter cells. Initially, in the mitotic phase, the nuclear membrane breaks down, allowing the chromosomes to be sorted and separated. This ensures that each daughter cell receives a full set of chromosomes, maintaining the diploid number. With cytokinesis following mitosis, the cytoplasm divides, marking the completion of cell division. This intricate dance of division maintains the integrity of the cell's heritable information and allows for growth and repair of tissues within our own bodies.