| Term | Definition |
| anaphase | a phase of mitosis and meiosis in which the chromosomes separate |
| asexual reproduction | reproduction that does not involve the union of gametes and in which a single parent produces offspring that are genetically identical to the parent |
| binary fission | a form of asexual reproduction in single-celled organisms by which one cell divides into two cells of the same size |
| cell plate | the precursor of a new plant cell wall that forms during cell division and divides a cell into two |
| cytokinesis | the division of the cytoplasm of a cell; cytokinesis follows the division of the cell's nucleus buy mitosis or meiosis |
| gamete | a haploid reproductive cell that unites with another haploid reproductive cell to form a zygote |
| interphase | a period between two mitotic or meiotic divisions during which the cell grows, copies its DNA, and synthesizes proteins |
| meiosis | a process in cell division during which the number of chromosomes decreases to half the original number by two divisions of the nucleus, which results in the production of sex cells |
| metaphase | one of the stages of mitosis and meiosis, during which all of the chromosomes move to the cell's equator |
| mitosis | in eukaryotic cells, a process of cell division that forms two new nuclei, each of which has the same number of chromosomes |
| prophase | the first stage of mitosis and meiosis in cell division; characterized by the condensation of the chromosomes and the dissolution of the nuclear envelope |
| spindle fiber | one of the microtubules that extend across a dividing eukaryotic cell; assists in the movement of chromosomes |
| telophase | the final stage of mitosis or meiosis, during which a nuclear membrane forms around each set of new chromosomes |
| cell division | the process by which a cell divides into two new daughter cells |
| sister chromatids | two identical cells |
| interphase | the "in-between" period of growth |
| G1 Phase | cells do most of their growing |
| G2 Phase | when DNA is replicated the cell enters this phase, many organelles and molecules required for cell division are produced |
| S Phase | key proteins associated with the chromosomes are synthesized during this phase |
| mitosis | part of the eukaryotic cell division during which the cell nucleus divides |
| interphase | the cell grows and replicates its DNA and centrioles |
| prophase | the chromatin condenses into chromosomes. the centrioles seperate, and a spindle begins to form. The nuclear membrane breaks down |
| metaphase | the chromosomes line up across the center of the cell. Each chromosome is connected to a spindle fiber at its centromere |
| anaphase | the sister chromatids seperate into individual chromosomes and are moved apart |
| telophase | the chromosomes gather at opposite ends of the cell and lose their distinct shapes. Two new nuclear membranes form. |
| cytokinesis | the cytoplasm pinches in half. Each daughter cell has an identical set of duplicate chromosomes |
| centrioles | two tiny structures located in the cytoplasm near the nuclear envelope |
| spindle | a fanlike microtuble structure that helps separate the chromosomes |
| internal regulators | proteins that respond to events within the cell |
| external regulators | proteins that respond outside the cell |
| cancer | uncontrolled cell growth |