What Happens During the G2 Phase of the Cell Cycle?

A cell grows and creates additional proteins during the G2 phase of the cell cycle. Once a cell completes the G2 phase, it begins the process of cell division.

Cell division is known as mitosis and consists of four phases. During prophase, the contents of the nucleus condense, and the nuclear membrane dissolves. The newly released chromosomes line up in the middle of the cell during metaphase. The chromosomes are pulled apart during anaphase, and nuclear envelopes form around the two new groups of chromosomes during telophase. Once the contents of the nucleus divide, the contents of the cytoplasm are divided in a stage known as cytokinesis.

Cytokinesis is followed by another growth stage called G1 phase. During G1 phase additional cell organelles are created for each future daughter cell and the amount of cytoplasm doubles. G1 phase is followed by replication of the cell's DNA during S phase. DNA is replicated by unzipping the ladder-like molecule and pairing each side with a new complementary strand. After S phase is complete, G2 phase begins again.

G1 phase, S phase and G2 phase are a part of the cell cycle known as interphase. Most of a cell's life is spent in interphase.