biology 3ch-8 review workshop 3 ch 8-slides.pdf · table 8.22 sex chromosomes abnormalities in...
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BIOLOGY 3 CH-8 REVIEW
WORKSHOP
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ContentsContentsContentsContents
�Cell Cycle�Mitosis�Mitosis�Meiosis
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Why do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?Why do cells divide?
Cell growth, repair, and
replacement of lost or
damaged cells.
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Asexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual ReproductionAsexual Reproduction VS. Sexual Reproduction
Figure A: Asexual Reproduction; bacteria undergoing binary fission (genetically identical)
Figure B: Sexual Reproduction; eukaryotic organism with offspring (not genetically identical)
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1122
3333
44
55
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The Eukaryotic Cell Cycle and Mitosis
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The Eukaryotic Cell Cycle
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The Eukaryotic Mitotic Phase
22 33
44
5566
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Growth factors signal and cell cycle
control system
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Meiosis and Crossing Over
Diploid CellDiploid Cell(Germ Cell)
Haploid CellHaploid Cell(Sperm or Egg Cell)
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Meiosis IMeiosis IMeiosis IMeiosis IInterphase
Metaphase I
Prophase I
Anaphase I
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Meiosis IIMeiosis IIMeiosis IIMeiosis II
*Telophase I
and
CytokinesisProphase II Metaphase II Anaphase II
Telophase II
and
Cytokinesis
*still considered Meiosis I
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CROSSING OVER
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CROSSING OVER (CONT.)
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CROSSING OVER (CONT.)
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Sex chromosomes
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Nondisjunction
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Abnormal Numbers of Sex Chromosomes
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