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• #Chromosomes duplicate during series

However, during the G 1 stage, the cell is quite active at the biochemical level. The first stage of interphase is called the G 1 phase, or first gap, because little change is visible. The three stages of interphase are called G 1, S, and G 2. For a cell to move from interphase to the mitotic phase, many internal and external conditions must be met. * Interphaseĭuring interphase, the cell undergoes normal processes while also preparing for cell division. Usually the cell will divide after mitosis in a process called cytokinesis in which the cytoplasm is divided and two daughter cells are formed. Mitosis is nuclear division during which duplicated chromosomes are segregated and distributed into daughter nuclei. During interphase, G1 involves cell growth and protein synthesis, the S phase involves DNA replication and the replication of the centrosome, and G2 involves further growth and protein synthesis.

#Chromosomes duplicate during series

A cell moves through a series of phases in an orderly manner. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated and the cell divides.įigure 1. During interphase, the cell grows and DNA is replicated. The cell cycle has two major phases: interphase and the mitotic phase ( Figure 1). Cells on the path to cell division proceed through a series of precisely timed and carefully regulated stages of growth, DNA replication, and division that produce two genetically identical cells.

The cell cycle is an ordered series of events involving cell growth and cell division that produces two new daughter cells.

Now, we will explore in more detail what happens to allow a single cell to divide and produce identical copies of itself, a process that is crucial for the normal development of an embryo, but that can lead to cancers if uncontrolled. We briefly addressed this in a previous chapter, when covering meiosis and gametogenesis.

In this section, we will cover the cell cycle in more detail.