lecture_12_notes

lecture_12_notes - BIS2A. Lecture 12 Eukaryotic cell...

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BIS2A. Lecture 12 Eukaryotic cell division Division can have two purposes Production of gametes for sex: meiosis. [Note: in later lectures life cycles cases where meio- sis does not directly, but eventually, produce gametes are given] Growth, making equal cells: mitosis Cell division for growth (mitosis): the cell cycle Observations of growing cells reveals four phases, called the Cell Cycle: G1 =gap 1, the state of a new cell (START) S = synthesis, DNA is replicated G2 = gap 2, after replication, preparing for actual division M = mitosis, division of nucleus Cytokinesis = division of cell Regulation of cell cycle Unregulated cell cycles are a disaster. For example, mitosis before S phase leads to death. Cancer is a case of unregulated cells that divide out of control. Many negative regulators (repressors) are in place to prevent cell cycles to occur at wrong time Progression through cycle phases is under a master regulator: Cyclin-dependent kinase
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This note was uploaded on 06/07/2009 for the course BIS BIS2A taught by Professor Lucacomai during the Spring '09 term at UC Davis.

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lecture_12_notes - BIS2A. Lecture 12 Eukaryotic cell...

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