Mr. Nettles Biology I: Cell Growth and Reproduction (Part 2)
Today’s Objectives <ul><li>I will define:  chromosomes ,  sister chromatids , and  centromere.   </li></ul><ul><li>I will ...
Agenda – Thurs., Sept. 22, 2011 <ul><li>Warm-Up </li></ul><ul><li>Presentations (Homework from last night) </li></ul><ul><...
Warm-Up <ul><li>Mitosis is a form of ________________ reproduction. </li></ul><ul><li>Eukaryotes reproduce by ____________...
Research: The Cell Cycle <ul><li>Choose one of the following stages of the cell cycle:  G1 phase, S phase, G2 phase, M pha...
The Cell Cycle <ul><li>A process by which cells:  </li></ul><ul><ul><li>Grow </li></ul></ul><ul><ul><li>make copies of chr...
The Cell Cycle <ul><li>Has three parts: </li></ul><ul><ul><li>Interphase </li></ul></ul><ul><ul><li>Mitosis </li></ul></ul...
Interphase <ul><li>G1 Phase = “gap 1” phase </li></ul><ul><ul><ul><ul><li>First growth stage </li></ul></ul></ul></ul><ul>...
Interphase
The set of 46 human chromosomes
Sister Chromatids  = the two identical parts on a chromosome Centromere  = the middle part that holds the sister chromatid...
Interphase <ul><li>G2 Phase = “gap 2” phase </li></ul><ul><ul><ul><ul><li>Second growth stage </li></ul></ul></ul></ul><ul...
Interphase Summary <ul><li>G1 : cell growth </li></ul><ul><li>S phase : DNA is  </li></ul><ul><li>copied </li></ul><ul><li...
M Phase (Mitosis) <ul><li>One division  of the cell nucleus to  produce two new daughter cells </li></ul><ul><li>Has four ...
1.  PROPHASE <ul><li>Chromosomes  appear </li></ul><ul><li>Centrioles  move to opposite ends of the cell </li></ul><ul><li...
2.  METAPHASE <ul><li>Chromosomes line up at the center or (middle) </li></ul>
3.  ANAPHASE <ul><li>Centromeres  split </li></ul><ul><li>Sister chromatids  separate to form individual chromosomes </li>...
4.  TELOPHASE <ul><li>Chromosomes  uncoil into chromatin </li></ul><ul><li>Nuclear membrane  reforms </li></ul><ul><li>Spi...
5. CYTOKINESIS <ul><li>The  cytoplasm of the cell  divides </li></ul><ul><li>Forms  two daughter cells  that are  exactly ...
Wrap-Up <ul><li>Which part of interphase involves  copying DNA ? </li></ul><ul><li>Which stage of Mitosis involves chromos...
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Cell reproduction (part 2)

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Cell reproduction (part 2)

  1. 1. Mr. Nettles Biology I: Cell Growth and Reproduction (Part 2)
  2. 2. Today’s Objectives <ul><li>I will define: chromosomes , sister chromatids , and centromere. </li></ul><ul><li>I will explore the stages of the cell cycle. </li></ul><ul><li>I will explore the phases of mitosis. </li></ul>
  3. 3. Agenda – Thurs., Sept. 22, 2011 <ul><li>Warm-Up </li></ul><ul><li>Presentations (Homework from last night) </li></ul><ul><li>Lesson </li></ul><ul><li>Wrap-Up </li></ul>
  4. 4. Warm-Up <ul><li>Mitosis is a form of ________________ reproduction. </li></ul><ul><li>Eukaryotes reproduce by _________________. </li></ul><ul><li>Prokaryotes reproduce by ________________. </li></ul>
  5. 5. Research: The Cell Cycle <ul><li>Choose one of the following stages of the cell cycle: G1 phase, S phase, G2 phase, M phase, or Cytokinesis. </li></ul><ul><li>Use the internet to research information about the stage that you have chosen. </li></ul><ul><li>Write four interesting things about what you read: </li></ul><ul><ul><ul><li>What is it? (The definition) </li></ul></ul></ul><ul><ul><ul><li>What happens? </li></ul></ul></ul><ul><ul><ul><li>How long does it happen? </li></ul></ul></ul><ul><ul><ul><li>What’s used? (What special cell parts or organelles are involved) </li></ul></ul></ul>
  6. 6. The Cell Cycle <ul><li>A process by which cells: </li></ul><ul><ul><li>Grow </li></ul></ul><ul><ul><li>make copies of chromosomes </li></ul></ul><ul><ul><li>divide into new daughter cells </li></ul></ul>copyright cmassengale
  7. 7. The Cell Cycle <ul><li>Has three parts: </li></ul><ul><ul><li>Interphase </li></ul></ul><ul><ul><li>Mitosis </li></ul></ul><ul><ul><li>Cytokinesis </li></ul></ul>copyright cmassengale
  8. 8. Interphase <ul><li>G1 Phase = “gap 1” phase </li></ul><ul><ul><ul><ul><li>First growth stage </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Cell gets bigger </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Cell prepares to copy its DNA </li></ul></ul></ul></ul>
  9. 9. Interphase
  10. 10. The set of 46 human chromosomes
  11. 11. Sister Chromatids = the two identical parts on a chromosome Centromere = the middle part that holds the sister chromatids together
  12. 12. Interphase <ul><li>G2 Phase = “gap 2” phase </li></ul><ul><ul><ul><ul><li>Second growth stage </li></ul></ul></ul></ul><ul><ul><ul><ul><li>Organelles needed for Mitosis are formed </li></ul></ul></ul></ul><ul><ul><ul><ul><ul><li>Centrioles and Spindle Fibers </li></ul></ul></ul></ul></ul>
  13. 13. Interphase Summary <ul><li>G1 : cell growth </li></ul><ul><li>S phase : DNA is </li></ul><ul><li>copied </li></ul><ul><li>G2 : cell prepares </li></ul><ul><li>for division </li></ul>
  14. 14. M Phase (Mitosis) <ul><li>One division of the cell nucleus to produce two new daughter cells </li></ul><ul><li>Has four phases (PMAT): </li></ul><ul><ul><ul><li>P rophase </li></ul></ul></ul><ul><ul><ul><li>M etaphase </li></ul></ul></ul><ul><ul><ul><li>A naphase </li></ul></ul></ul><ul><ul><ul><li>T elophase </li></ul></ul></ul>
  15. 15. 1. PROPHASE <ul><li>Chromosomes appear </li></ul><ul><li>Centrioles move to opposite ends of the cell </li></ul><ul><li>Chromosomes attach to the spindle </li></ul><ul><li>Nucleolus and nuclear membrane breaks down </li></ul>
  16. 16. 2. METAPHASE <ul><li>Chromosomes line up at the center or (middle) </li></ul>
  17. 17. 3. ANAPHASE <ul><li>Centromeres split </li></ul><ul><li>Sister chromatids separate to form individual chromosomes </li></ul><ul><li>Anaphase ends when the movement of chromosomes stops </li></ul>
  18. 18. 4. TELOPHASE <ul><li>Chromosomes uncoil into chromatin </li></ul><ul><li>Nuclear membrane reforms </li></ul><ul><li>Spindle breaks apart </li></ul>
  19. 19. 5. CYTOKINESIS <ul><li>The cytoplasm of the cell divides </li></ul><ul><li>Forms two daughter cells that are exactly like the parent cell (each have one complete set of chromosomes) </li></ul>
  20. 20. Wrap-Up <ul><li>Which part of interphase involves copying DNA ? </li></ul><ul><li>Which stage of Mitosis involves chromosomes lining up at the middle ? </li></ul><ul><li>What are chromosomes made up of? </li></ul>
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