Prophase
The first stage of mitosis, when the chromatin condense into chromosomes and become visible. The nuclear membrane breaks down, and the centrioles move to opposite ends of the cell.
http://www.edupic.net/Images/Mitosis/prophase.png
(Pearson Prentice Hall, 2010)
http://www.edupic.net/Images/Mitosis/prophase.png
(Pearson Prentice Hall, 2010)