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Cell Division - Bi Sci 001 Monday February 1 1999...

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Bi Sci 001 Monday February 1, 1999 Announcements: Review Session tonight at 110 Wartick Lab, from 6:30-7:30 Lecture notes: Cell Division Prokaryotes : (no nucleus) divide by binary fission. One piece of DNA divides, there are no organelles to separate. Mitosis : the mechanism by which eukaryotic cells of the new generation receive a duplicate of the parental DNA. Cytokinesis : dividing up of the cytoplasm. This happens in late anaphase or telophase. Chromosomes : pieces of DNA with attached DNA proteins. A cell of a species can have as many as 1,000. Usually that are 10-50. Sister Chromatids : duplicated DNA. Centromere : the area where sister chromatids are attached. Condensed chromosome : a chromosome which has coiled itself into a compact unit prior to separation of sister chromatids. (mitosis/meiosis). Kinetochores : Chromosomal proteins that form on the sides of each centromere. They become attached to microtubules that help move chromosomes during the nuclear division processes (mitosis/meiosis).
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