The cell theory is a series of events from the time a cell forms until its cytoplasm divides.
Interphase is the interval between mitotic divisions when a cell grows.
During prophase the chromosomes become visible as paired chromatids and the nuclear envelope disappears.
During metaphase the chromosomes are aligned midway between single poles.
During anaphase chromatids separate and move toward opposite spindle poles.
During telophase chromosomes arrive at opposite spindle poles and decondense; two new nuclei forms.
Telomeres are noncoding repeat DNA sequences that are found at the ends of eukaryotic chromosomes.
Cancer cells characteristically express high levels of telomerase. Mutations in multiple checkpoint genes are required to transform a normal cell into a malignant one. Cancer cells divide relentlessly.