domingo, 9 de junho de 2013

Cell Cycle

Cell cycle is the life cycle of a cell. Their duration vary among the different types of cells. A single cell cycle is the set of events before each division. It relates a parent cell, which is the original cell and the daughter cells, which are the new cells that a are formed in each cell division.
The cell cycle is divided into two phases: The growth phase and the division phase. Each of them are divided in other phases.

The Growth Phase


The growth phases is also called the interphase, and it is divided into 4 distinct phases.

  • G1 (gap 1) phase: The G1 phase is the period where the cell grows.
  • G0 phase: This only happens in certain cells. G0 phase is basically a phase where the cell stop growing and doesn't look forward to divide.
  • S (synthesis) phase: In this phases the DNA is copied
  • G2 (gap 2) phase: Period at which there is more growth of the cell, as well as other structures are formed.
The Division Phase

The division phase is divided into two phases:
  • Mitosis: The division of genetic material and the contents of the nucleus into two different sets.
  • Cytokinesis: The division of the the cytoplasm and the other organelles. 

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