mitosis - Figure 12.6 The mitotic spindle at metaphase...

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Figure 12.0 Mitosis
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Figure 12.1a The functions of cell division: Reproduction
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Figure 12.1b The functions of cell division: Growth and development
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Figure 12.1c The functions of cell division: Tissue renewal
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Figure 12.2 Eukaryotic chomosomes
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Today’s Topics Eukaryotic Cell Cycle The mitotic apparatus
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Two main types of cells prokaryotic (~ 1 µm) eukaryotic (~50 µm)
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Events of Cell Division Reproductive signal DNA replication Segregation of DNA Cytokinesis: separation of the new cells
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Basics Prokaryotic cells divide by binary fission but eukaryotic cells have a cell cycle consisting of three “stages” : interphase, mitosis, and cytokinesis.
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In eukaryotes, chromosome duplication and distribution occurs Chromatin fibers: DNA and proteins (S phase)
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The cell cycle
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The Mitotic Spindle
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Unformatted text preview: Figure 12.6 The mitotic spindle at metaphase Possible Mechanisms for Chromosome Movement (cytoplasmic dynein) Chromosomes move at about 1 m per minute (very slow!) Cell Division Mitosis: division of the nucleus Cytokinesis: division of the cytoplasm Golgi derived vesicles Cytokinesis in animal and plant cells Actin and myosin Sea Urchin Egg Plant Cells vesicles Practice Use props for 2n=4. Without your notes use a piece of paper and pen (or other props) to demonstrate your knowledge of an animal cell (2n = 4) undergoing division: interphase, prophase, metaphase, anaphase, telophase, cytokinesis homologous chromosome sister chromatids mitotic spindle, centrioles, centrosome, centromere, kinetochore...
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mitosis - Figure 12.6 The mitotic spindle at metaphase...

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