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Mitosis is a process where a regular cell nucleus replicates the number of chromosomes in it in preparation for the process of cytokinesis, which is actually where the parent cell divides into two daughter cells. The chromosomes are replicated, then divided, and sent to two opposing ends of where the nucleus used to be. The nuclear envelope reforms around the chromosomes, then the process of cytokinesis begins, where the whole cell actually splits into two daughter cells. Each daughter cell contains the same number of chromosomes as the parent cell had, so if the diploid number of chromosomes was sixteen, each daughter cell will have sixteen chromosomes as well. Mitosis is important for the replacement of body cells, which wear out over time. There is another cell replication process known as meiosis, but that is for the production of sex cells, or gametes, which have the chromosome count halved. This half-chromosome count is referred to as a haploid number.
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