What allow crops to be modified? 

     Agrobacterium tumefaciens is a plant pathogen capable of transferring a

 defined segment of DNA to a host plant, generating a tumor. Replacing the 

transferred tumor-inducing genes with exogenous DNA allows the introduction 

of any desired gene into the plant. (Citation 5)


Why are they produced? 

   GM foods are developed because there is some perceived advantage either to the producer or consumer of these foods. This is meant to translate into a product with a lower price, greater benefit (in terms of durability or nutritional value) or both. Initially GM seed developers wanted their products to be accepted by producers so have concentrated on innovations that farmers (and the food industry more generally) would appreciate.

The initial objective for developing plants based on GM organisms was to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of resistance against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.

(Citation 6)


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