The SAC is a checkpoint in this process which prevents activity of APC until correct attachment and tension is detected. Megakaryocytes undergo a variant of this process in which they becomes polyploid. Kinetochores and centrosomes attach to microtubules in this process, lining chromosomes up along an equatorial plate. The end of this process sees the cleavage furrow complete and is called cytokinesis, though more properly the final step of this process is telophase in which two daughter nuclei form around the separated chromosomes. For 10 points, name this process in 
The SAC is a checkpoint in this process which prevents activity of APC until correct attachment and tension is detected. Megakaryocytes undergo a variant of this process in which they becomes polyploid. Kinetochores and centrosomes attach to microtubules in this process, lining chromosomes up along an equatorial plate. The end of this process sees the cleavage furrow complete and is called cytokinesis, though more properly the final step of this process is telophase in which two daughter nuclei form around the separated chromosomes. For 10 points, name this process in which a cell divides without changing its number of chromosomes.
The SAC is a checkpoint in this process which prevents activity of APC until correct attachment and tension is detected.
{Mitosis} [prompt on "M phase"]