Unit 6 Notes: The Cell Cycle

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Presentation transcript:

Unit 6 Notes: The Cell Cycle Tuesday 2-2-2010 Unit 6 Notes: The Cell Cycle

(1) Big Ideas: Cells spend most of their “life” preparing to divide. Cells prepare for division because: Need to Grow Need to Copy DNA Need to Check for Errors

(2) The Cell Cycle Interphase: Cell Division (M-Phase): G1 Phase S Phase G2 Phase Cell Division (M-Phase): Mitosis  If a Non-Sex Cell Meiosis  If a Sex Cell

(3) G1 Phase 1st Growth Phase: G1 CheckPoint: Cell Increases in Size. Extra Proteins & Organelles are made. G1 CheckPoint: After G1 Phase Makes sure enzymes are ready for DNA Replication. Makes sure extra proteins and organelles are made.

(4) S Phase Synthesis Phase: Exact copy of cell’s DNA is made: Extra DNA is Synthesized. DNA is Replicated or Copied. Exact copy of cell’s DNA is made: Mistakes  Termination or Cancer. DNA copied inside nucleus.

(5) G2 Phase 2nd Growth Phase: G2 CheckPoint: Cell Grows More. Remaining Proteins & Organelles Made. G2 CheckPoint: After S and G2 Phase. Makes sure DNA was replicated correctly. Makes sure all proteins and organelles were copied.

(6) M Phase (Cell Division): Mitosis OR Meiosis

Let’s Watch A Cartoon… http://www.youtube.com/watch?v=qmTEiddrGOM