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Notes: Life of a Cell




Part 2: Cell Reproduction
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”
I. What is Cell Division?
• PRODUCTION of DAUGHTER cells
II. What will happen because of cell
division?
• GROWTH and DEVELOPMENT: because
 of an increase in cell number, cell size, and cell
 products, the organism grows in stages and
 shows developmental difference.
III. Two Types of Cell Division

     Asexual             Sexual

Set up a table     Or tree map in
                   space provided
Asexual

• Mother cell reproduces 2 IDENTICAL
  daughter cells
• Example: MITOSIS
• Types of cells reproduced: body cells
  (somatic)
• Happens in both Eukaryotic and
  Prokaryotic cells
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
IV. Eukaryotic Cell Division – Up Close

A. The CELL CYCLE: events of the cell that
   happen before, during, and after cell division
o   THREE special events: Interphase (I), Mitosis
    (M), and Cytokinesis (C)
1. Interphase (I): 70-90% of cell’s life

• NO active cell division
• 3 phases: G1, S, G2
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
2. Mitosis (PMAT): DIVISION of the cell’s
NUCLEUS
 • Separation of CHROMOSOMES in a
   series of processes
 • Resulting cell has 2 new NUCLEI
 • 4 distinct phases: PMAT
3. Cytokinesis (C): final DIVISION of the
Cell’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
Cell reproduction part 2
Mitosis Flow Map:

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Cell reproduction part 2

  • 1. Notes: Life of a Cell Part 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 cell division? • 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 Sexual Set 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 Close A. The CELL CYCLE: events of the cell that happen before, during, and after cell division o 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’s NUCLEUS • 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 the Cell’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