Mitosis / The Cell Cycle.

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Mitosis.	A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
The Cell Cycle.	- Interphase. - Prophase. - Metaphase. - Anaphase. - Telophase. - Cytokenesis. - Check points.
Interphase.	G1 / Gap 1 - All organelles are replicated. S / Synthesis - DNA replicates. G2 / Gap 2 - All enzymes are produced.
Prophase.	- Chromosomes condense and become visible. - They appear as 2 sister chromatids being held together at the centromere. - Spindle fibres begin to form. - Centrioles migrate to opposite poles. - Nuclear envelopes disintegrates. - Chromosomes attach to the spindles.
Metaphase.	- Chromosomes are all aligned at the equator of the cell.
Anaphase.	- Chromosomes are separated and pulled into separate poles.
Telophase.	- Cleavage furrow forms in the centre of the cell, splitting it down the middle. - Chromosomes begin to de-condense. - Nuclear envelope reforms around them.
Cytokinesis.	- Completes cell division by extending the cleavage furrow to completely separate newly formed daughter cells.
Check points.	The cell cycle has check points to see whether the cell is replicating accurately. If not, the cell cycle will try to correct this or inhibit it. The three check points occur at : - G1. - G2. - Spindle formation.

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	Creado por Khashayar Khani hace más de 9 años