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Genetics

Cell cycle

cell division
 continuity of life, reproduction of cells
 reproduction
 unicellular organism
 growth
 repair and renew

cell cycle
 life of a cell from origin to division into 2 new daughter cells

mitosis – cell division in somatic cells

somatic cell – all cells in the body besides sex cells

gamete cell – sex cells
 meiosis

exact copy of genetic material, DNA, is passed to daughter cells
 division step – mitosis

cytokinesis – splitting the cytoplasm

dividing cells duplicates DNA
 separates each copy to opposite ends of cell
 splits into 2 daughter cells
 - separates 2 copies so each daughter cell has completely identical copy
 error rate – 1 per 100 million bases
 - 3 million base pairs
 - mammalism genome
 - 30 errors per cell cycle
 - mutation

DNA is organized in chromosomes
 double helix DNA molecule
 associated proteins, histone proteins
 DNA – protein......


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Approximate Word Count: 688
Approximate Pages: 3 (250 words per double-spaced page)

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