Two stages of cancer cell division. The image shows the replicated chromosomes in purple. The cell contains two spindles with microtubules, shown in green. In the top image, these microtubules have attached themselves to contact points (in yellow) of the chromosomes and are pulling the copies away from each other in opposite directions. In the bottom image, this process has been completed and the chromosomes are evenly distributed between what will become the nuclei of the new daughter cells.