The total hereditary endowment of a cell of a particular species is called its genome. Genomes are organized into multiple functional units called chromosomes. They are supercoils of a DNA-protein complex called chromatin. The exist in different states at different stages of the cell cycle. The cell cycle is a well-ordered sequence of events in which a cell duplicates its contents and then divides in two.
Some cells go through repeated cell cycles.
Mitosis - Division of the nucleus 2. Interphase , the nondividing phase, includes most of a cell's growth and metabolic activities. When the control system malfunctions, cancer may result. The cell-cycle control system has checkpoints in the Gl, G2, and M phases of the cell cycle. A go-ahead signal usually indicates that the cell will complete the cycle and divide.