Nuclear division is the process by which a cell divides its nucleus, resulting in the formation of two daughter nuclei. This process is essential for cell reproduction and occurs during the cell cycle, specifically in the phases of mitosis and meiosis. Mitosis produces two genetically identical cells, while meiosis results in four genetically diverse cells, crucial for sexual reproduction. During nuclear division, the genetic material, or DNA, is replicated and evenly distributed to ensure that each new nucleus receives the correct number of chromosomes. This process is tightly regulated to maintain genetic stability and prevent errors that could lead to diseases, such as cancer.