Chapter 9 - Cell Division

Chapter 9 - Cell Division - Chapter 9 - Cell Division I....

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Chapter 9 - Cell Division I. All living things contain DNA, which is organized into informational units, genes II. Eukaryotic chromosomes - major carriers of genetic info in nucles - linear chromo A. Chromo. made of complex of DNA and histones (proteins) B. Chromo. exist as partially unraveled strands when cell is not dividing - chromatin C. Chromatin fibers coil and condense during cell division and become visible as distinct structures - chromo. . 1. Chromo. made of two arms extending from centromere a. Before dividing, a cell duplicates its chromo. - two copies remain attached at centromere b. Each copy is called a sister chromatid III. Cell cycle - cell division: activities of a cell from one cell division to the next - involves two main processes A. Mitosis - process that involves nucleus and ensures each new nucleus receives the same number and type of chromo. present in the original nucleus 1. Cytokinesis - division of cytoplasm of the cell to form two cells, starts before the end of mitosis B. Prokaryotic cells - DNA is contained in a single, circular chromo. found in cytoplasm
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This note was uploaded on 03/08/2010 for the course BIO 220 taught by Professor Morre during the Spring '09 term at USC.

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Chapter 9 - Cell Division - Chapter 9 - Cell Division I....

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