This is a diagrammatic representation of the normal somatic cell cycle. Cells that are not actively dividing, or are no longer capable of division, are in G0. When somatic cells are mitotically active, they spend most of the ccell cycle in interphase, preparing for mitosis. The stages of the cycle are as follows:

Component	Features
G0	Resting phase, with no reproductive activity, typical of fully differentiated cells
G1	Prior to DNA replication, the cell synthesizes RNA and proteins
S	DNA replication occurs, doubling the amount of DNA by the end of this phase
G2	DNA repair takes place, and the cell prepares to enter mitosis
M	Mitosis occurs, resulting in a reduction division of the DNA into two daughter cells

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