BIO 325L Lecture 8 - This Week In Lab. Quiz Lab activities...

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Quiz Lab activities Genetically modified organisms (GMO): Part 1 (pp.98-101) DNA extraction and PCR amplification Controls Test Foods Bacterial transformation Part 1 (pp.64-68) 1 This Week In Lab….
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What do you need to turn in? This week (3/20-21) Homework 7: Fly lab analysis (Chi-square tests) WA #4: First draft essay Submit to Blackboard before 10 PM Wed. 3/21/12 Next week (3/27-28) - Homework 8: Crossing Over in Flies 2
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The Countries that Grow 99% of the World's Transgenic Crops 69% 23% 7% 1% USA Argentina Canada China seed Genetically Modified Organisms [aka “transgenic” organisms]
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Why have GM crops? Growing human population Loss of farmable land Remediation of soil Enrich nutrient content
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Desirable Traits Herbicide Tolerance Viral Resistance Drought Resistance C4 plants, stomata that close to minimize water loss. Increased Nutritional Value Golden Rice, beta carotene Altered Ripening Flavr Savr tomatoes, (delayed ripening, long shelf-life) Pest Resistance
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Bacillus thuringiensis ( Bt ) … ..is a naturally occurring bacterial disease of insects. Toxins of these bacteria are the active ingredient in some insecticides. Bt insecticides are most commonly used against some caterpillars. Bt is considered safe to people and nontarget species. Some formulations can be used on essentially all food crops.
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Possible Risks of GM Foods t Insects might develop resistance to pesticide- producing GM crops t Herbicide-tolerant crops may cross- pollinate weeds, resulting in
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Possible Risks of GM Foods - Certain gene products may be allergens - There could be unintended effects on wildlife and beneficial insects Photo courtesy of T. W. Davies, Cal. Acad. of Sciences.
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BIO 325L Lecture 8 - This Week In Lab. Quiz Lab activities...

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