Monday, February 13, 2012

Mitosis

Hello people today we will talk about cells.


Well first a cell divides to make to identical cells called daughter cells. But it does this through mitosis. Mitosis has different stages like interphase, prophase, prometaphase, metaphase, anaphase, telophase, and cytokinesis.






Interphase is when the DNA has been replicated but has not become a chromosome yet. They still are chromatin.






Prophase is when The DNA molecules shorten to form chromosomes. And you cant see the nuclear membrane.




Metaphase is when the spindle fibers attach  to the centromeres of the chromosomes and align the the chromosomes.






Anaphase is when the spindle fibers shorten and the centromere splits and separated sister chromatids are pulled behind the centromeres. 






Telophase is when the chromosomes reach the poles of their spindles. And the spindle fibres disintegrate.





Cytokinesis is when the cell fully divides and there are now two cells.