Term
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Definition
| reproduction of cells-mitosis |
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Term
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Definition
| life of a cell from its origin in the division of a parent cell until its own division into two (interphase, mitosis, cytokinesis) |
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Definition
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Definition
| sex cells - sperm and egg |
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Term
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Definition
| DNA-protein complex in long, thin threads not visible under a light microscope |
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Definition
| duplicated chromosomes, contain identical copies of the chromosome's DNA molecule |
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Definition
| region that joins the two sister chromatids |
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Definition
| division of the nucleus-prophase, metaphase, anaphase, telophase |
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Term
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Definition
| division of the cytoplasm |
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Term
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Definition
| cell division that produces sex cells (sperm and egg) |
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Term
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Definition
| part of the cell cycle that includes mitosis and cytokinesis, usually shortest part |
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Term
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Definition
| 90% of the cell cycle, cell growsn and copies chromosomes (contains three parts G1, S, G2) |
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Term
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Definition
| part of interphase in which the chromosomes duplicate |
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Term
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Definition
| first phase of mitosis: nuclear membrane and nucleolus disintegrate, spindle fibers form, centrosomes move to opposite poles, spindle fibers attach to kinetochores on chromosomes |
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Term
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Definition
| chromosomes become aligned along the middle of the cell |
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Definition
| sister chromatids pulled apart |
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Term
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Definition
| nuclear membrane and nucleolus refrom, chromosomes disperse, spindle apparatus breaks down, cleavage furrow begins to form |
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Term
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Definition
| region on the centromere where the spindle fibers attach in order to pull the sister chromatids apart |
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Term
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Definition
| microtubules and proteins that originate at the centrosome and attach to the chromosomes at the kinetochores |
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Term
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Definition
| name given to the arrangement of microtubules from the centrosomes "stars" |
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Term
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Definition
| midway between the poles of the cell where the chromosomes align |
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Definition
| shallow groove in the cell surface near the old metaphase plate; first indication that cytokinesis is going to occur |
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Definition
| produced in plates instead of a cleavage furrow; made of vesicle contents derived from the Golgi |
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Term
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Definition
| bacterial reproduction meaning "division in half" |
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Term
| cell cycle control system |
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Definition
| set of molecules in the cell that both triggers and coordinates key events in the cell cycle |
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Term
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Definition
| stop and go signals that regulate the cell cycle |
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Term
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Definition
| nondividing state of a cell |
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Term
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Definition
| protein in a cell that's concentration fluctuates |
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Term
| Cdk's (cyclin dependent kinases) |
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Definition
| molecules in constant concentration in the cell |
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Term
| MPF-maturation promoting factor |
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Definition
| association of cyclin with Cdk's that initiates mitosis by phophorylating a variety of proteins |
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Term
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Definition
| protein released by body cells that stimulates other cells to divide |
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Term
| density-dependent inhibition |
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Definition
| phenomenon in which crowded cells stop dividing |
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Term
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Definition
| cells must be attached to a substratum in order to divide |
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Definition
| process that converts a normal cell to a cancer cell |
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Definition
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Term
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Definition
| lump that remains at the original site |
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Term
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Definition
| lump that becomes invasive and moves eventually impairing the function of other organs |
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Term
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Definition
| spread of cancer cells beyond their original site |
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