What are the 4 main parts to the cell cycle? What happens in each part?

A bit more about each of the 4 main stages of the cell cycle

Mitosis can be further divided into

• Prophase - Chromosomes become visible, spindle fibers form, nuclear envelope dissolves


• Metaphase - Chromosomes line up in the middle of the cell.


• Anaphase - Chromosome pairs seperate to different sides of the cell by the spindle fibers.


• Telophase - New nuclei are formed around each grouping of Chromosomes


• Cytokinesis - The cytoplasm is split in two, forming two new cells.

G1 - period of growth and activity.  Also, the time where the cell performs its function (ex. liver cells producing insulin)

S - synthesis - stage where DNA replication occurs

G2 - continued growth, building of spidle fibers and centrioles, both structures needed for Mitosis phase.

Hope this fills out your question a bit!