What is Mitosis?

Mitosis meaning The process by which a single parent cell divides to make two new daughter cells. Each daughter cell receives a complete set of chromosomes from the parent cell. This process allows the body to grow and replace cells. This process starts at mitosis (M-phase) and ends with mitosis. In between are the G-1, S, and G-2 phases. The duration of S, M and G-2 are relatively constant in different tissues. Between the mitosis phase and the S-phase is a gap (G-1) where production of RNA, proteins and enzymes needed for DNA synthesis occurs. The duration of G-1 varies and determines the length of the cell cycle.The S-phase is when DNA synthesis occurs.Between the S-phase and M-phase is a second gap (G-2). Cells are thought to prepare for mitosis in G-2 when specialized proteins and RNA are produced. G-0 is a dormant phase.


reference: national Cancer Institute – Glossary for Registrars

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