Sci 9 Lesson 4 Mar 4 - Ch 5.2 Cloning


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BC Science 9
Ch. 5.2 Human-assisted Cloning
pp. 176-178

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Sci 9 Lesson 4 Mar 4 - Ch 5.2 Cloning

  1. 1. Homework from last class: <ul><li>Answer Reading Check Questions 1-5 p. 178 </li></ul><ul><li>Study for Quiz on Asexual Reproduction </li></ul><ul><li>Keep working on your Mitotic Movies project - due March 8 for Science 9 (1-1) </li></ul><ul><li>Read over class notes and check out the class blog: </li></ul>
  2. 2. How much would you pay for this puppy?? <ul><li> </li></ul>
  3. 3. Human-assisted Cloning Chapter 5.2 pp. 176-178
  4. 4. Human-assisted Cloning <ul><li>Unlike simpler animals such as sponges and hydras, more complex animals lose their cloning ability as they become specialized. </li></ul><ul><li> Human assistance is required </li></ul><ul><li>Humans use all the asexual cloning methods in order to produce desired results with organisms: </li></ul><ul><li>Binary fission Budding Fragmentation </li></ul><ul><li>Vegetative Reproducition Spore Formation </li></ul>
  5. 5. Reproductive Cloning <ul><li>Reproductive cloning: (aka adult DNA cloning) </li></ul><ul><li>Purpose is to produce a genetic duplicate of an existing or dead organism. </li></ul><ul><li>*Not all body cells can be used to make a clone </li></ul><ul><li>(some cells are specialized)* </li></ul><ul><li>Steps involved: </li></ul><ul><ul><ul><li>Remove nucleus from an egg cell </li></ul></ul></ul><ul><ul><ul><li>A mammary gland cell is removed from an adult female </li></ul></ul></ul><ul><ul><ul><li>Electricity fuses mammary and egg cell </li></ul></ul></ul><ul><ul><ul><li>Fused cell begins dividing </li></ul></ul></ul><ul><ul><ul><li>Dividing embryo is inserted into surrogate mother </li></ul></ul></ul>
  6. 6. Reproductive Cloning p. 177
  7. 7. Reproductive Cloning <ul><li>Issues: </li></ul><ul><li>Only 10% of clones usually survive </li></ul><ul><li>Surviving clones can be abnormally large and have higher rates of infection and cancer </li></ul>Example: Dolly (the cloned sheep) died after only 6 years due to lung disease Average sheep lifespan: 10-12 years)
  8. 8. Therapeutic Cloning <ul><li>Therapeutic cloning: used to correct health problems </li></ul><ul><ul><li>Very important to therapeutic cloning are stem cells (cells that can become different types of cells) </li></ul></ul><ul><ul><li>Controversial because the best stem cells are from embryos which are destroyed when harvesting cells </li></ul></ul><ul><ul><li>Stem cells can be used to replace cells damaged from injuries or disease </li></ul></ul><ul><ul><li>Diabetes, spinal injuries, Parkinson’s disease are only a few that can benefit from stem cell therapy </li></ul></ul>
  9. 9. Activity time! Disagree/Agree/Neutral
  10. 10. Disagree/Agree/Neutral Activity <ul><li>I will post a controversial statement about cloning. Individually, decide whether you agree, disagree, or are neutral. </li></ul><ul><li>Once you decide on your position, move to the designated location. </li></ul><ul><li>The ‘Agree’ group will talk together and come up with a joint statement about why they agree with the statement. </li></ul><ul><li>The ‘Disagree’ group will do the same thing. </li></ul><ul><li>The ‘Neutral’ group will think of 1 question they want to ask the ‘Agree’ and ‘Disagree’ group to help them choose a side. </li></ul><ul><li>The ‘Agree’ group and ‘Disagree’ group will make a final statement . The people in the ‘Neutral’ group must then choose a side. </li></ul>
  11. 11. Statement <ul><li>It is reasonable to spend $155,000 to clone a beloved pet if I have the money and desire to do so. </li></ul><ul><li>(remember Lancelot Encore from the video?) </li></ul>
  12. 12. Statement <ul><li>It is wrong to destroy stem cells from embryos that are able to develop into an individual/person. </li></ul>
  13. 13. Statement <ul><li>Human-assisted cloning is an abuse of power – it is not natural, and therefore we should avoid doing it. </li></ul>
  14. 14. Statement <ul><li>We should concentrate our efforts on cloning famous people (ex. Albert Einstein) and extinct animals. </li></ul>
  15. 15. Statement <ul><li>I would want to have a clone of myself so that there will be a supply of my organs in case any of my organs fail. </li></ul>
  16. 16. Make Your Own Clone! <ul><li>“ Click and Clone” – Make a copy of a brown mouse named Mimi! </li></ul><ul><li> </li></ul>
  17. 17. Homework for next class: <ul><li>Read the Yeast Lab on pp. 179-181 </li></ul><ul><li>Keep working on your Mitotic Movies project - due March 8 for Science 9 (1-1) </li></ul><ul><li>Read over class notes and check out the class blog: </li></ul>
  18. 18. Works Cited <ul><li>Images taken from the following sources: </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul><ul><li> </li></ul>