Cell reproduction part 2

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  • 1. Notes: Life of a CellPart 2: Cell Reproduction
  • 2. Cell Reproduction• According to the CELL THEORY, all CELLS come from PREEXISTING cells and have the capability of reproducing• Life is based on the reproduction of cells or “CELL DIVISION”
  • 3. I. What is Cell Division?• PRODUCTION of DAUGHTER cells
  • 4. II. What will happen because of celldivision?• GROWTH and DEVELOPMENT: because of an increase in cell number, cell size, and cell products, the organism grows in stages and shows developmental difference.
  • 5. III. Two Types of Cell Division Asexual SexualSet up a table Or tree map in space provided
  • 6. Asexual• Mother cell reproduces 2 IDENTICAL daughter cells• Example: MITOSIS• Types of cells reproduced: body cells (somatic)• Happens in both Eukaryotic and Prokaryotic cells
  • 7. Sexual• After sperm and egg are produced, fusion of these cells produces a non-identical cell• Example: Meiosis• Types of cells produced: sperm/egg• Only in Eukaryotic cells
  • 8. IV. Eukaryotic Cell Division – Up CloseA. The CELL CYCLE: events of the cell that happen before, during, and after cell divisiono THREE special events: Interphase (I), Mitosis (M), and Cytokinesis (C)
  • 9. 1. Interphase (I): 70-90% of cell’s life• NO active cell division• 3 phases: G1, S, G2
  • 10. Make an Interphase flow map on the bottom of your paper:Interphase G1 S Phase G2 • 3 • Growth • DNA • Final Phases • Metabolic copies growth processes
  • 11. 2. Mitosis (PMAT): DIVISION of the cell’sNUCLEUS • Separation of CHROMOSOMES in a series of processes • Resulting cell has 2 new NUCLEI • 4 distinct phases: PMAT
  • 12. 3. Cytokinesis (C): final DIVISION of theCell’s CYTOPLASM • 2 new DAUGHTER cells (Identical) • Animal cells pinch or cleave into 2 cells • Plant cells separate as new cell wall divides the 2 cells
  • 13. Mitosis Flow Map: