The biology of DNA is as complex as the DNA material itself. The somatic cells or body cells are produced in mitosis. These types of cells differ from gametes or sex cells because they are not expected to fuse with other cells in the process of reproduction. At the end of mitosis, the daughter cells are identical to the parent cell, and they remain that way until their death.
The goal of mitosis is to produce more cells that are identical to the parent cell for the purpose of growth or repair. Mitosis is only a fraction of a stage in the cell cycle, which also includes interphase and cytokinesis. Mitosis is further divided into the stages of prophase, prometaphase, metaphase, anaphase and telophase. In these stages, the sister chromosomes become viable enough to separate from each other and become two separate entities. During these stages, the chromosomes remain unchanged in terms of genetic content. In mitosis, there is rarely genetic recombination in contrast to mitosis.
Successive cellular generations are not completely identical due to spontaneous mutations during mitosis. These mutations lead to genetic variation in species. These mutations are also random and are not expected to occur during normal somatic cell division.