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Do Now: Why do cells need to divide?
Vocabulary: binary fission, budding, regeneration, mitosis
New York Times Article Summaries due Tomorrow
Read page 244-249. Answer S.A. Page 249 #2, 3, 4, 6 due on Monday
Quiz on Cell Cycle and Mitosis on Monday
Read pages 250-252. Answer S.A. Page 252 #1-5 due Wednesday
Scrapbook due Wednesday!
Larger cell places demands on DNA that it cannot fulfill Ex: Large town; small library
Larger cell is unable to keep up with the intake of nutrients and the release of waste products Ex: Two way street for a busy town cause traffic
build up if the street is not enlarged
Cell cycle is how the cell grows, prepares for division, divides into two new daughter cells and then they each repeat the cycle again
What happens in phase G1?Cell has a growth spurt and increases in size while synthesizing new proteins and organelles
What happens in phase S?Replication of genetic material
What happens in phase G2? Organelles and molecules needed for cell division are
made
What happens in the M Phase?Mitosis (cell division) takes place. Two identical cells with the same genetic information as parent cell are produced
Do Now: What are the stages of the cell cycle? Why must a cell replicate its DNA before it can divide?
QUIZ HAS BEEN CANCELLED!
Hand in New York Times Article Summaries
Read page 244-249. Answer S.A. Page 249 #2, 3, 4, 6 due on Monday
Read pages 250-252. Answer S.A. Page 252 #1-5 due Wednesday
Scrapbook due Wednesday!
M phase
G1
S
G2
Sketch this diagram in your notebook.
(I) Play My Accordion Terribly Interphase (not really a phase of mitosis) Prophase Metaphase Anaphase Telophase
Centrioles
Chromatin
Interphase
Nuclear envelope
Cytokinesis
Nuclear envelope reforming
Telophase
Anaphase
Individual chromosomes
Metaphase
Centriole
Spindle
CentrioleChromosomes
(paired chromatids)
Prophase
Centromere
Spindle forming
Section 10-2
Go to Section:
Centrioles
Chromatin
Interphase
Nuclear envelope
Cytokinesis
Nuclear envelope reforming
Telophase
Anaphase
Individual chromosomes
Metaphase
Centriole
Spindle
CentrioleChromosomes
(paired chromatids)
Prophase
Centromere
Spindle forming
Section 10-2
Go to Section:
Centrioles
Chromatin
Interphase
Nuclear envelope
Cytokinesis
Nuclear envelope reforming
Telophase
Anaphase
Individual chromosomes
Metaphase
Centriole
Spindle
CentrioleChromosomes
(paired chromatids)
Prophase
Centromere
Spindle forming
Section 10-2
Go to Section:
Centrioles
Chromatin
Interphase
Nuclear envelope
Cytokinesis
Nuclear envelope reforming
Telophase
Anaphase
Individual chromosomes
Metaphase
Centriole
Spindle
CentrioleChromosomes
(paired chromatids)
Prophase
Centromere
Spindle forming
Section 10-2
Go to Section:
Centrioles
Chromatin
Interphase
Nuclear envelope
Cytokinesis
Nuclear envelope reforming
Telophase
Anaphase
Individual chromosomes
Metaphase
Centriole
Spindle
CentrioleChromosomes
(paired chromatids)
Prophase
Centromere
Spindle forming
Section 10-2
Go to Section:
How is mitosis different in plant cells than in animal cells?
There are 2 differences!!
Why is cell division necessary?
Why must it be controlled?
Go to Section:
Contact Inhibition: Cells normally stop multiplying when they come in contact with other cells. This is mediated by cell cycle genes. Cells with mutated cell cycle genes continue to multiply, even when other cells are in close contact.
