3 1 cell cycle overview (k)
DESCRIPTION
mitosisTRANSCRIPT
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Ch. 3.1 Cell Cycle & Cell Division
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Focus Questions:
1. What are the phases of cell cycle?
2. What happens to the DNA during the cell cycle?
3. What happens during the mitotic phase?
4. Why is cell division important?
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1. What are the phases of cell cycle?
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1. What are the phases of cell cycle?
Cell cycle
Interphase
(growth & development)
G1 stage:
Rapid growth (some cells stop here)
S stage:
growth & DNA copied
G2 stage:
growth & storing energy for division
Mitotic phase
(cell division)
Mitosis:
Division of nucleus
Cytokinesis:
division of cytoplasm
Organ
elle
s rep
licate
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Interphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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2. What happens to the DNA during the cell cycle?
1. Interphase – DNA is copied during S stage
2. DNA coils up into chromosomes
3. Identical chromosomes pair up to form a duplicated chromosome (with 2 sister chromatids)
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2. What happens to the DNA during the cell cycle?
4. During mitotic phase, sister chromatids will divide into 2 cells
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Cell Cycle Sort
• Separate into 3 piles: terms, definition, & pictures
• Put the pictures into the correct order
• Match the definitions to the pictures
• After, use your book (pg. 90-91) to check the order and to add the terms
• Create a 6-tab foldable:– Outside of tab: Draw picture
– Inside of tab: Write term with definition
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3. What happens during the mitotic phase?
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Mitosis
(nucleus &
DNA
divides)
Cytoplasm & rest
of cell divides
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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
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Anaphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Telophase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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Cytokinesis
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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4. Why is cell division important?
• Reproduction – unicellular organisms
• Growth & development
• Replacement – replaces old & worn out cells
• Repair – from injuries & other damage