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Cell Division
| Term | Definition |
|---|---|
| mitosis | a process of cell division which produces new cells for growth and repair that are identical to the parent cell |
| meiosis | a process of cell division which produces reproductive (sex) cells that carry half the genetic material of the parent |
| gamete | reproductive cells, such as sperm and egg cells, that contain half of the genetic material from the parent cell |
| DNA | the material that carries all the information about how a living thing will look and function |
| chromosome | threadlike structure within the nucleus of a cell that contains the genetic information DNA |
| chromatin | a molecule made of tightly wound up DNA; when it is coiled up, it is called a chromosome |
| interphase | the normal or resting state of a cell |
| prophase | phase of mitosis between interphase and metaphase in which chromatin condenses into chromosomes and the nuclear membrane and nucleolus break down in order to prepare the cell for division |
| metaphase | phase of mitosis between prophase and anaphase in which the chromosome pairs line up along the center (equator) of the cell |
| anaphase | phase of mitosis between metaphase and telophase in which the chromosome pairs are pulled apart to opposite sides of the cell |
| telophase | phase of mitosis after anaphase in which two new nuclear envelopes form to contain each half of the DNA; the cell membranes form and separate the two new cells |
| cytokinesis | occurs after telophase; the cytoplasm divides and the parent cell separates to form two new identical daughter cells |
| centriole | organelle that produces spindle fibers in order to help the cell separate during mitosis |
| centromere | the structure that holds the two parts of a chromosome pair together |
| spindle fiber | filaments from the centriole that connect to the centromeres of chromosome pairs and pull them apart as the cell separates in anaphase |