| Term | Definition |
| cell cycle | regular sequence of growth and division that cells undergo |
| mitosis | stage of the cell cycle during which the cell's nucleus divides |
| interphase | first stage of the CELL CYCLE -- everything in the cell is being copied |
| prophase | stage of MITOSIS when the nucleus dissolves and chromatids appear |
| metaphase | stage of MITOSIS when the chromatids line up in the middle of the cell |
| anaphase | stage of MITOSIS when the chromatids are pulled apart by the spindle fibers |
| telophase | stage of MITOSIS when the nucleus reforms |
| cytokinesis | stage of CELL DIVISION when the cytoplasm pinches to separate the two cells |
| centriole | part of the cell that anchors the spindle fibers at the poles of the cell |
| spindle fibers | thin fibers that pull the chromatids apart during anaphase |
| chromatin | thin strands of genetic material in the nucleus of the cell |
| chromosome | chromatin that has twisted and condensed into rods |
| chromatids | a chromosome matched up with its identical copy |