Lecture 1 - Jan 6 2010

Lecture 1 - Jan 6 2010 - 9 Chromosomes, the Cell Cycle, and...

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9 Chromosomes, the Cell Cycle, and Cell Division
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9 Chromosomes, the Cell Cycle, and Cell Division Why must cells divide? How do prokaryotes and eukaryotes divide? What is the cell cycle? How is it controlled? What happens during mitosis and meiosis? Why is Meiosis Important in Sexual Reproduction? How Do Cells Die?
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Why do cells divide?
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What are the consequences of cell division?
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9.1 How Do Prokaryotic and Eukaryotic Cells Divide? Four events must occur for cell division: Reproductive Signal : to initiate cell division Replication : of DNA Segregation : distribution of the DNA into the two new cells Cytokinesis : separation of the two new cells
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9.1 How Do Prokaryotic Cells Divide? Prokaryotes divide by binary fission Reproductive signals: nutrient availability and environmental conditions Prokaryotes have one chromosome - a single circular molecule of DNA ori —where replication starts Separation of chromosome and cytokinesis
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Figure 9.2 Prokaryotic Cell Division
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9.1
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Lecture 1 - Jan 6 2010 - 9 Chromosomes, the Cell Cycle, and...

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