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12 Cards in this Set
- Front
- Back
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anaphase
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[Gk. ana, away, + phasis, form] A stage in mitosis in which the chromatids of each chromosome separate and move to opposite poles; also, similar stages in meiosis in which chromatids or paired chromosomes move apart
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cell plate
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The partition that forms at the equator of the spindle in the dividing cells of plants and a few green algae during early telophase
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entromere
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[Gk. kentron, center, + meros, part] Region of constriction of a chromosome that holds sister chromatids together
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kinetochore
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[Gk. kinetikos, causing motion, + chorus, chorus] Specialized protein complex that develops on each centromere and to which spindle fibers are attached during mitosis or meiosis
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metaphase
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The stage of mitosis or meiosis during which the chromosomes lie in the equatorial plane of the spindle
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mitotic spindle
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The array of microtubules that forms between the opposite poles of a eukaryotic cell during mitosis
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phragmoplast
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A spindle-shaped system of microtubules that arises between two daughter nuclei at telophase and within which the cell plate is formed during cell division, or cytokinesis. Phragmoplasts are found in all green algae except members of the class Chlorophyceae and in all plants
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phragmosome
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The layer of cytoplasm that forms across the cell where the nucleus becomes located and divides
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preprophase band
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A ringlike band of microtubules, lying just beneath the plasma membrane, that delimits the equatorial plane of the future mitotic spindle of a cell preparing to divide
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prophase
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Gk. pro, before, + phasis, form] An early stage in nuclear division, characterized by shortening and thickening of the chromosomes and their movement to the metaphase plate
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spindle fibers
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Bundles of microtubules, some of which extend from the kinetochores of the chromosomes to the poles of the spindle
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telophase
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The last stage in mitosis and meiosis, during which the chromosomes become reorganized into two new nuclei
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