2/9/15 starter: copy and answer the following question 2/9/15 169 73 connection/ exit: thinking...
TRANSCRIPT
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2/9/15
Starter: copy and answer the following question
2/9/15
16973
Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same?
Mitosis Notes
What process produces new cells?
Practice/ application:Glue notes here when done
170Mitosis Notes
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February 9,2015
AGENDA
Objective 7.12 F recognize that according to cell theory all organisms are composed of cells and cells carry on similar functions such as extracting energy from food to sustain life by completing mitosis poster.
1. Starter2. Practice3. Exit
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1/23 Characteristics of Living things 149-1501/26 Levels of Organization 151-1521/27 Unicellular Microscopy 153-1541/28 Is it living? 155-156 1/29 Cell Theory Notes 157-158 1/30 Cell Notes 159-160 2/2 Plant/Animal Cell Comparison 161-1622/3-4 Organelle Trail Research and Poster 163-1642/5 Cell State 165-166 2/6 Cell Comparison Booklet 167-1682/9 Mitosis Notes 169-170
Table of Contents
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2/9/15
Starter: copy and answer the following question
2/9/15
16973
Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same?
Mitosis Notes
What process produces new cells?
Practice/ application:Glue notes here when done
170Mitosis Notes
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How do little elephants grow up to be BIG elephants?
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Why do animals shed their skin?
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The process is
Mitosis the process in which the nucleus divides to form
two new nuclei.
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The process of asexual reproduction begins
after a sperm fertilizes an egg.
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Three reasons why cells reproduce by asexual reproduction:
1. Growth 2. Repair 3. ReplacementSkin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.
Cell that reproduce by asexual reproduction reproduce constantly.
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There are 6 stages to Mitosis:
• Interphase
• Prophase
• Metaphase
• Anaphase
• Telophase & Cytokinesis
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Interphase occurs before mitosis begins
• Chromosomes are copied (# doubles)• Chromosomes appear as threadlike coils
(chromatin) at the start, but later change to sister chromatids at end of this phase
CELL MEMBRANENucleus
Cytoplasm
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Interphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Prophase 1st step in Mitosis
• Mitosis begins (cell begins to divide)• Centrioles (or poles) appear and begin to
move to opposite end of the cell. • Spindle fibers form between the poles.
CentriolesSister chromatids
Spindle fibers
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Prophase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
Centrioles
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Metaphase 2nd step in Mitosis
• Chromatids (or pairs of chromosomes) attach to the spindle fibers.
Centrioles
Spindle fibers
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Metaphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Anaphase 3rd step in Mitosis
• Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell.
Centrioles
Spindle fibers
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Anaphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Telophase 4th step in Mitosis
• Two new nuclei form. • Chromosomes appear as chromatin
(threads rather than rods).• Mitosis ends.
NucleiNuclei
Chromatin
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Telophase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Cytokinesisoccurs after mitosis
• Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.
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Animal Mitosis -- Review
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
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Plant Mitosis -- ReviewInterphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
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26
- Cell Division
The Cell Cycle
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Cell Cycle
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2/9/15
Starter: copy and answer the following question
2/9/15
16973
Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same?
Mitosis Notes
What process produces new cells?
Practice/ application:Glue notes here when done
170Mitosis Notes