| Term | Definition |
| cell division | division of a parent cell into daughter cells |
| centriole | structure that helps to form the spindle |
| spindle | microtubule structure that separates chromosomes during mitosis |
| cell cycle | cell grows, prepares to divide, then divides to start growth process again; interphase + M phase |
| telophase | last phase of mitosis, chromosome are in two new cells and nuclear membranes start to reform |
| interphase | cell grows, performs its normal functions, and prepares for division; consists of G1, S, and G2 phases |
| mitosis | division of the nucleus or chromosomes |
| metaphase | phase of mitosis in which chromosomes line up in the center of the cell |
| prophase | first phase of mitosis in which chromosomes become visible and nuclear membraine disappears |
| cytokinesis | division of the cytoplasm (cytosol and organelles) |
| anaphase | phase of mitosis in which sister chromatids are pulled to opposite sides of the cell |
| cancer | uncontrolled cell division |
| G1 phase | stage of interphase in which cell grows and performs its normal functions |
| S phase | stage of interphase in which DNA is replicated |
| G2 phase | stage of interphase in which cell duplicates its cytosol and organelles |
| gamete | sex cell, sperm or egg |
| meiosis | type of cell division that creates gametes; cell divides twice to create four cells that are genetically unique |
| crossing-over | process by which homologous chromosomes exchange pieces, resulting in greater genetic variety |