1. Interphase: This is the longest phase of the cell cycle, which can last 18-24 hours. During this phase, the cell grows, synthesizes proteins, and replicates its DNA. The synthesis of many building blocks including amino acids, purine and pyrimidine nucleotides, lipids and carbohydrates occurs.

2. Prophase: This phase is one of the stages of the cell cycle and one of the longest ones. During this stage the first visible signs of mitosis take place. DNA starts to condense into thicker structures and the nucleus membrane begins to break down.

3. Metaphase: This is the second phase of the cell cycle and the shortest. After prophase, in which the individual chromatids condensed the chromosome structure can be observed. They are at their most condensed state during metaphase. At the end of this stage all chromosomes are fully condensed and visible under a microscope. They begin to move towards the middle of the cell where the spindle fibers meet on the equator.

4. Anaphase: This is the third phase of the cell cycle. In this phase the sister chromatids are pulled apart and move towards the separate ends of the cell. The spindle fibers that are attached to the chromosomes contract, pulling the sister chromatids apart. Each pole now has a complete set of chromosomes.