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Cell Reproduction
| Question | Answer |
|---|---|
| DNA | deoxyribonucleic acid; genetic information of the cell |
| chromatin | long thin form of DNA |
| chromosome | tightly wound form of DNA |
| cell cycle | a series of events that takes place from one cell division to the next |
| interphase | nuclear membrane is visible; DNA in the form of chromatin; DNA replicates - makes an exact copy |
| mitosis | the process in which the nucleus divides to form two identical nuclei |
| prophase | nuclear membrane disappears; DNA coils into chromosomes; centrioles move to opposite ends of the cell; exact copies of DNA are held together by a centromere |
| centromere | area where the two duplicate copies of DNA are held together in a chromosome |
| metaphase | centrioles are at the poles of the cell; spindle fibers connect from the centrioles to the centromeres; chromosomes line up in the middle of the cell |
| anaphase | spindle fibers shorten; chromosomes split at the centromere |
| telophase | nuclear membrane reappears; DNA unwinds from chromosomes into chromatin; overlaps with cytokinesis |
| cytokinesis | division of the cytoplasm |
| cell plate | Area across the middle of a dividing plant cell where the new cell wall forms during cytokinesis |
| three reasons for cell division | growth |
| fission | method by which bacteria reproduce |
| budding | new organism growing from body of the parent |
| regeneration | regrow body parts that are lost or damaged |