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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 |