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P5 e-Learning science genetically modified food


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P5 e-Learning science genetically modified food

  1. 1. Genetically Modified/ Engineered Food.
  2. 2. What are GM crops? <ul><ul><li>Plants which have been genetically altered to express a desirable trait (Perry 2003) </li></ul></ul><ul><ul><ul><li>Herbicide resistance </li></ul></ul></ul><ul><ul><ul><li>Virus resistance </li></ul></ul></ul><ul><ul><ul><li>Insecticides </li></ul></ul></ul><ul><ul><ul><li>Environmental Tolerance </li></ul></ul></ul><ul><ul><ul><li>Increased nutritional value </li></ul></ul></ul>
  3. 3. Natural genetic evolution of the maize crop took 10,000 years. From Teosinte (top) to corn or maize (bottom)
  4. 4. Genetic modification can shorten this process to a few years.
  5. 5. Plant Breeding and Crop Yield Tons per hectare
  6. 6. Peas (on the left) that make a genetically engineered bean protein are insect-resistant and do not need to be sprayed with pesticides.
  7. 7. What are people’s concerns <ul><li>Is this food safe? </li></ul><ul><li>Should food be labeled? </li></ul><ul><li>Are there adverse environmental effects? </li></ul>
  8. 8. What about their nutritional value and safety?
  9. 10. References <ul><li> </li></ul><ul><li> </li></ul>