Ch8.2Mitosis

Ch8.2Mitosis - Centrioles double in animals Prophase...

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Mitosis & Cytokinesis Cell Growth and Reproduction Ch. 8.2
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Why do cells divide by Mitosis ? Reproduction of single celled organisms under? conditions constant environment Amobea Reproducing
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Cells dividing by Mitosis……. Identical to original cell Same chromosome # Identical chromosome makeup Skin
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Cell Cycle 24 hours “G” or Growth 1 phase “S” or DNA Synthesis Growth 2 “M” or Mitosis phase / / /
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Where is DNA located ? 1. Nucleus 2. Chromosomes DNA
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Duplicated Chromosome (Late Interphase): Sister Chromatids Centromere
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: Pull apart the sister chromatids Spindle fibers
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Cytokinesis :cell’s cytoplasm divides & splits apart
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Stages of Mitotic Cell Division Pro phase Meta phase Ana phase Tel ophase 1st” “middle” “apart” “far” or separate
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Interphase “Intermission” Normal metabolic activities Major state DNA= chromatin
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Late Interphase Prepares for mitosis DNA doubles= Sister chromatids
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Unformatted text preview: Centrioles double in animals Prophase Nuclear membrane disappears Doubled DNA = condensed chromosomes Spindle fibers Metaphase Chromoso mes line up mid- cell Facing inward Anaphase Chromosomes move to opposite poles at Centrioles in animals Spindle apparatus in plants Telophase Cells divide Cell plate or membranes form Nucleus reappears Returns to Interphase Intermission Normal metabolic activities Major state DNA=chromatin Plant versus Animal Mitosis Plant: Cell wall from cell plate in telophase Sindles Animal: No cell wall membrane cytokinesis Centrioles Animal Telophase Interphase Plant Anaphase Interphase Cancerous cells . .. 1.Divide too many times 2.Divide into more than two cells! Masses of cells = tumors benign malignant...
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Ch8.2Mitosis - Centrioles double in animals Prophase...

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