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biology
cell division - chapter 10
| Term | Definition |
|---|---|
| cancer | a disease of the cell cycle; a disorder in which some of the body's own cells lose the ability to control growth |
| centriole | two tiny structures located in the cytoplasm near the nuclear envelope |
| chromatin | granular material visible within the nucleus; consists of DNA tightly coiled around proteins |
| crossing over | process in which homologous chromosomes exchange portions of their chromatids during meiosis |
| diploid | refers to a cell that contains both sets of homologous chromosomes |
| haploid | refers to a cell that contains only a single set of chromosomes and therefore only a single set of genes |
| interphase | the "in between" period of cell growth and division |
| mitosis | division of cell nucleus; first stage |
| sister chromatid | one of two identical "sister" parts of a duplicated chromosome |
| tetrad | structure containing 4 chromatids that forms during meiosis |
| cell cycle | the series of events that cells go through as they grow and divide. |
| centromere | area where the chromatids of a chromosome are attached |
| chromosome | threadlike structure within the nucleus containing the genetic information that is passed from one generation of cells to the next |
| cytokinesis | division of cytoplasm; second stage |
| gamete | specialized cell involved in sexual reproduction |
| homologous chromosomes | pair of matching chromosomes in an organism, with one being inherited from each parent |
| meiosis | process by which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell |
| prophase | first and longest phase of mitosis |
| spindle | a fanlike microtubule structure that helps separate the chromosoes |
| zygote | fertilized egg |