Lec12 - Mitosis Meiosis Thurs finish digestion end of...

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Mitosis & Meiosis Thurs 10/11/11 finish digestion end of lecture outline on “Role of Macromolecules” posted online; cover on your own Chromosomes & DNA homologous chromosomes / sister chromatids Cell cycle Mitosis - cellular division growth & repair Meiosis - sexually reproducing species production of gametes (eggs & sperm)
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Mitosis : process of cellular division Meiosis:
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Terminology: Chromosomes diploid - haploid - 22 pairs of duplication of DNA --
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Humans have 22 pairs of autosomes and 1 pair of sex chromosomes. karyotype: chromosomes are in their duplicate state
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Chromosomes: ~40% DNA & 60% proteins contains genes 23 pairs of chromosomes (46) each member of a homologous pair duplication of chromosomes page 85
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GENES
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double-helix Replication of DNA precise copying DNA replication necessary prior to cell division
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Cell Cycle: mitosis normal functioning of cell cell divides some will continue to some go off and cancer – fig 5.4
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Mitosis - cell division fig 9.2 Fig 5.5
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