Cell Cycle & Mitosis Phases

Cell Cycle

The series of events cells go through as they grow and divide (includes interphase and mitosis).

Interphase

The longest phase; cell grows, performs normal functions, and duplicates DNA.

G1 Phase (Interphase)

Cell grows and performs normal functions.

S Phase (Interphase)

DNA is replicated (copied).

G2 Phase (Interphase)

Cell prepares for division by producing organelles and proteins.

Mitosis

Process where the nucleus divides to form two identical nuclei.

Prophase

Chromatin condenses into chromosomes, spindle fibers form, and the nuclear membrane breaks down.

Metaphase

Chromosomes line up in the middle (equator) of the cell.

Anaphase

Sister chromatids are pulled apart to opposite sides of the cell.

Telophase

Chromosomes begin to uncoil, new nuclear membranes form, and two nuclei are visible.

Cytokinesis

Division of the cytoplasm; results in two separate daughter cells.

Result of Mitosis

Two genetically identical diploid cells with the same number of chromosomes as the original.

Purpose of Mitosis

Growth, repair, and asexual reproduction in body (somatic) cells.