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Lecture04d_bio201_f07a[1]

Lecture04d_bio201_f07a[1] - ARIZONA STATE UNIVERSITY...

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Human Human Anatomy Anatomy & Physiology & Physiology SEVENTH EDITION SEVENTH EDITION Elaine N. Marieb Elaine N. Marieb Katja Hoehn Katja Hoehn ARIZONA STATE UNIVERSITY ARIZONA STATE UNIVERSITY School of Letters & Sciences School of Letters & Sciences Lecture Series 5 Lecture Series 5
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Bio 201 ASU DPC J. Cell Division Essential for body growth and tissue repair Mitosis – nuclear division Cytokinesis – division of the cytoplasm
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Bio 201 ASU DPC J. Mitosis The phases of mitosis are: Prophase Metaphase Anaphase Telophase
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Bio 201 ASU DPC J. Cytokinesis Cleavage furrow formed in late anaphase by contractile ring Cytoplasm is pinched into two parts after mitosis ends
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Bio 201 ASU DPC J. Chromosomal Disjunctions – (Trisomy) Trisomy 21 (47, XY, +21) – Down’s Syndrome Common, 1 in 800-1,000 rate, some congenital defects
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Bio 201 ASU DPC J. Chromosomal Disjunctions – (Trisomy) Trisomy 13 (47, XX, +13) – Patau’s syndrome Rare to survive to birth, 1 in 6,000 rate, neonataly fatal
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Bio 201 ASU DPC J. Control of Cell Division Surface-to-volume ratio of cells Chemical signals such as growth factors and hormones Contact inhibition Cyclins and cyclin-dependent kinases (Cdks) complexes
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