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Published byChrystal Ryan Modified over 9 years ago
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Genetically Modified Foods
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Introduction What is it Genetic modification is the altering of a species genome to produce a desired result. This can be achieved in two ways: Selective breeding - Only breed organisms with desired traits. Long drawn process Genetic Engineering - Direct manipulation of genes. Extraction of desired gene from any organism and insertion into desired organism http://ucanr.org/freepubs/docs/8178.pdf When did it begin Ancient times Questions - what is your position on GMO? In support of?
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Benefits Take less time to mature More weather, pest and disease resistant - Reduced pesticide use Can be engineered to have more nutrients
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Costs loss of biodiversity - GM plants outcompete natural plants Creation of superweeds - Cross pollination of GM weeds with similar wild species - Herbicide tolerance passed to other plants EX Herbicide resistant GM Oilseed Rape - crossed with similar plant species and gave them herbicide tolerance. ? it better to engineer plants to be inherently more immune to pests or to use natural crops and have to use pesticides.
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Examples Round up Ready Some round up ready crops include Corn Canola Soybeans Roundup - Toxicity Class 3 according to EPA Any examples that you know of? Are they positive or negative? http://www.monsanto.com/monsanto/ag_products/input_traits/so ybeans.asp
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Examples Canola Bred from a poisonous plant called Rapeseed GM to be herbicide resistant Canola is one of Canada’s most valued crops http://www.canola-council.org/facts_export.aspx ? Do you feel comfortable consuming Canola Oil?
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Examples – Golden Rice rice with increased iron and vitamins that may alleviate chronic malnutrition in Asian countries, and a variety of plants able to survive weather extremes. http://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtml Golden Rice - Rice fortified with Vit A to prevent blindness in Africa and Asia Social Issues Research center http://www.sirc.org/gate/genetically_modified_food.html http://www.sirc.org/gate/genetically_modified_food.html
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BT Maize Corn engineered to produce a toxin that kills certain boring insects ? What kind of effect might this have on us and our ecosystems http://www.gmo-safety.eu/en/maize/631.docu.html
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GMO in Africa ? See any advantages GMO might offer Africa or developing countries ? Pros Draught resistant crops Able to produce own food Cons - Reduced market size - europe does not purchase GMF GM crops might impact flaura and fauna
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Controversy South Africa + Zambia – Drought – starvation – but would accept GM food from donors. Health Concerns Other countries only accept milled GM grain – environmental concerns? ? Is it right for the government to let people starve rather than to accept GM food aid http://news.bbc.co.uk/2/hi/africa/2459903.stm http://www.un.org/ecosocdev/geninfo/afrec/vol16no4/164 food2.htm http://www.un.org/ecosocdev/geninfo/afrec/vol16no4/164 food2.htm
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Genetic Modified food Policy
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Food Labelling No GM labels in Canada or US - How do you feel about not knowing whether the food you eat is genetically modified.?
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Conclusion Has your position on GM food changed?
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