(1.2) Cell Division - Mitosis (p28-31)
(1.2) Cell Division - Mitosis (p28-31). Cell Cycle In the cell cycle, a precise sequence of events leads to the creation of new cells. The events are:
Jan 17, 2016
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(1.2) Cell Division - Mitosis(p28-31)
Cell Cycle
In the cell cycle, a precise sequence of events leads to the creation of new cells. The events are:
• Interphase• Mitosis (including prophase, metaphase,
anaphase, and telophase)• Cytokinesis
Creating New Cells- the steps
Page p29
Figure 1.10
Creating New Cells- the steps
Remember the steps!
InterphaseProphaseMetaphaseAnaphaseTelophaseCytokinesis
I Prefer Mice And Talking Cats
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
The nucleolus, is a structure composed of proteins and nucleic acids found within the nucleus.
Chromatin condenses to form chromosomes.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
Replicated chromosomes are also called sister chromatids.In animal cells, a pair of organelles called centrioles move to each end of the cell, forming poles of the miotic spindle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
Each chromosome is connected to a the spindle fibre at its centromere.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
New animal cells are created during the cell cycle.New animal cells are created during the cell cycle.
Cell Cycle Diagrams
• Interphase
• Prophase
• Metaphase
• Anaphase
• Telephase
• Cytokinesis
MITOSIS
MitosisDiagrams & Images
Cell Division – Uncontrolled!
• If a cell ignores a signal to stop dividing, unchecked cell growth can result. Over time, the newly divided cells form a mass called a tumour.
• A mutation (a permanent change in a cell’s DNA) is what causes the cells to ignore the “stop” signals.
• Cancer cells differ from normal cells in shape, size, and content.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
Cancer Cells• Benign tumour
cells tend to look normal.
• Cancer cells (malignant tumour cells) look much more “unusual”.
Copyright © 2010 McGraw-Hill Ryerson Ltd.
Normal vs Cancerous Cell DivisionNormal vs Cancerous Cell Division
Cancer Cells
Cancer Cells
Drinking causes liver cancer
Recap – Videos
Mitosis(1)Mitosis(2)
WORKSHEET: “Mitosis” &“Getting to Know the Cell Cycle”
NOTE: BIOLOGY TEST #1 - Fri. May 17
Classwork
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