Download Notes Outline: How Cells Divide (4

Name________________________ Class # ______ Period_________ Date___________
Notes Outline: Mitosis and Cell Division (6.2)
“ As cells busily carry out the functions of life, they grow and develop. When most cells reach a
certain size, they either stop growing or divide into two cells. Cell division is essential for the growth
and development or an organism.”
I.
How Bacteria Divide
A.
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II.
Introduction
When a healthy, living cell reaches a certain size, it will either stop growing or divide
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In bacteria, the hereditary information is encoded in a single circle of DNA
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In bacteria, cell division takes place in two stages
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First DNA is copied, then the cell splits
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How Eukaryotic Cells Divide
A. Introduction
 Eukaryotic cells carry far more DNA than bacteria
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 Chromosomes:
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 A typical human cell contains 46 chromosomes, located within the nucleus
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 Two processes evolved enabling eukaryotic cells to divide: Mitosis & Cell Division
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 Mitosis:
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 Cytokinesis:
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 The end result of mitosis and cell division is two cells with the same genetic information
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III.
The Cell Cycle
 Mitosis and cytokinesis are just small portions of a cell’s lifespan.
 Cell Cycle_______________________________________________________________
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IV.
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Life Span of Cells
A. Introduction
 No cells live forever
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 On rare occasions, cells disobey the instructions to die
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 Tumor:_________________________________________________________________
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Cancer: ________________________________________________________________
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Mutation:_______________________________________________________________
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Sections Completed__________Questions Answered________ Total Grade___________