genetically modified foods_final

8/7/2019 Genetically modified foods_final

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GENETICALLY

MODIFIEDFOODS


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What is a GeneticallyModified (GM)Food?

Foods that contain an added genesequence

Foods that have a deleted gene

sequenceAnimal products from animals fedGMfeed

Products produced by GMorganisms


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Methodof genemodification

Find anorganism with thedesiredtrait

Isolate the gene sequence that codes

for thedesired trait

Insert the gene sequence into thegenomeof the plant cell


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Allow the genetically altered cell togrow into a plant

Allow the plant to propagate


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A vector cancarry DNA.Thevector can be apellet from a

gene gun.

Viruses andbacteria also can

beutilized totransfer genes.


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Why produceGM foods?

To improve thequality of foodTo improve food production to feed the world

To strengthen the resistance against herb andpests

To cope better with climatic changes

To minimize the cost of production

To minimize loss during transport and storage


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Possible Benefits

of GMFoods

Easing of world hungerDevelopment of crops that canbe grown in marginal soil

Reduced strainonnonrenewableresources

Development of droughtresistant cropsDevelopment of salt-tolerantcropsDevelopment of crops thatmake more efficient use ofnitrogen and other nutrients


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Possible Benefits

of GMFoods

Reduceduseof pesticides andherbicides

Development of pest resistantcrops

Reduced herbicideuse is

better for theenvironmentand reduces costs forfarmers


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Possible Benefits

of GMFoods

Improved crop quality

Development of frost resistantcropsDevelopment of diseaseresistant crops

Development of flood resistantcropsImprovednutritional quality

Development of foods designedto meet specific nutritional

goals


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CommonGMFoodTomato

Cabbage

Maize

Pasta


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Who makes sureGMfoods are safe?

Government agenciesregulateGM foodsGM foods in the UnitedStates are required to

be labeledonly if thenutritional value ischangedor a newallergen is introduced.


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Possible Risks

of GMFoods

Insects might developresistance to pesticide-producing GM crops

Herbicide-tolerant cropsmay cross-pollinateweeds, resulting in"superweeds"


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Possible Risks

of GMFoods

Certain geneproducts may beallergens, thuscausing harm tohuman healthThere may beunintended harm towildlife and beneficialinsects


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SomeExamples of GMFs

Flavr Savr tomatoes US,1994

Bt corn US, 1996

Roundup Ready Soybeans US, 1996

Golden Rice Switzerland,1999


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Conclusion

Assessment of thelist of risksindicates that GMcrops arecurrently far toorisky to beusedfor foodor animalfeed.


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Conclusion

Producers and consumersneed to be awareof thelooming dangers

Information concerningproducts containing GMmaterial is essential

In food preparations soyoil, cornstarch andglucose syrup shouldnotbeusedunless origin isclear.


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Thank you!

genetically modified foods_final

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