Genetically modified foods


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Genetically modified foods

  1. 1. Genetically Modified Foods Flavr Savr Tomatoes Anna Niemeyer
  2. 2. What are Genetically Modified foods?• Crop plants that have been modified in laboratories to enhance traits such as resistance to pesticides or improved nutritional content.• Bigger and better crops• Improved taste and look
  3. 3. Before the Flavr Savr• Picked before ripe and gassed with ethylene to give red color – keeps them from becoming bruised and spoiled.• Tomatoes lose their taste and taste more like “cardboard.”
  4. 4. What is the Flavr Savr?• A tomato that will not soften while ripening on the vine.• A tomato implanted with a gene from E. coli• The transgenic tomato would allow tomatoes to be shipped safely, keep their color, and have their natural flavors.• Increased shelf life re
  5. 5. Making the Flavr Savr• Gene from E. coli inserted into plasmid, Kan(r)• Plasmid inserted into tomato in a growth medium containing an antibiotic• The antibiotic kills cells that do not have the plasmid in them• Purpose of Bacterial Gene- identify cells that were not genetically transformed
  6. 6. The Gene• Flavr Savr Gene- a strand of RNA that is reverse of the RNA that occurs in the plant• Original RNA- Produces enzyme Polygalacturonase• Flavr Savr RNA- binds to Polygalacturonase so the enzyme can’t break down pectin (causes tomato to become soft). The two strands cancel each other out
  7. 7. Flavr Savr• Basically, the gene in the tomato stops the tomato from softening during ripening so that it is easier to ship but keeps its natural flavors too. The tomato also has a much longer shelf life and keeps from spoiling quickly.
  8. 8. Pro’s and Con’s Pro’s Con’s• Longer shelf life • Safety- health risks, some• Easier to ship environmental risks• Enhanced taste • Possible monopolies for• Resistance to businesses disease, pests, herbicides • Ethical concerns• “Green” • Only rich countries can• Food security for growing afford it population
  9. 9. Ethics• Tampering with nature• Violation of organism’s natural intrinsic values Can cause issues in plants
  10. 10. Current Status• Used in crops• Used in animals• 69 million hectares modified• Adding more genetically modified foods around the world
  11. 11. The Future• Adding drugs into foods• Crops that produce vaccines vaccine that will treat hepatitis B• Plants that make plastics• Animals maturing quicker• Improving shelf life
  12. 12. ExamplesAgainst GM For GM