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10/30/14
Bell work:
What are the phases and stages of the cell cycle?
Announcements:
• FINISH SCIENCE FAIR EXPERIMENT!!!
• Tables & Graphs due Mon. 11/3
#8
Objectives:Students will graph data.
Students will identify the phases of cell cycle.
Students will explain how a cell divides.
Ch. 3.1 Cell Cycle & Cell Division
Instead of taking notes, check your worksheet.
(ADV: check your notes)
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?
1. What are the phases of cell cycle?
During which part of cell cycle does a cell spend most of its life?
A. Mitosis
B. Interphase
C. Prophase
D. Metaphase
E. Telophase
F. Anaphase
G. Cytokinesis
Mito
sis
Inte
rphase
Prophas
e
Meta
phase
Telo
phase
Anaphase
Cytokin
esis
0 0 0 0000
45
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
Check the “Phases of the cell cycle chart”
Interphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
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)
Copy on the back
2. What happens to the DNA during the cell cycle?
4. During mitotic phase, sister chromatids will divide into 2 cells
Copy on the back
Draw this
What is the name for the coiled up DNA that are an X-shape?
A. Chromatid
B. DNA
C. Chromatin
D. Chromosome
Chrom
atid
DNA
Chrom
atin
Chrom
osom
e
0 000
45
3. What happens during the mitotic phase?
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
Mitosis
(nucleus &
DNA divides)
Cytoplasm & rest
of cell divides
Prophase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Spindle fibers
Centrioles
Metaphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Anaphase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Telophase
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Cytokinesis
Animal Cell Plant Cell
Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm
Which of the following is NOT a part of mitosis?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
E. Cytokinesis
Prophas
e
Meta
phase
Anaphase
Telo
phase
Cytokin
esis
0 0 000
45
4. Why is cell division important?
• Reproduction – unicellular organisms
• Growth & development
• Replacement – replaces old & worn out cells
• Repair – from injuries & other damage
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
