Question

define genetically modified crops.how are they formed? explain the significance with suitable examples
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Answer 1

Genetically modified crops (GM crops or biotech crops) are plants used in agriculture, the DNA of which has been modified using genetic engineering methods. In most cases, the aim is to introduce a new trait to the plant which does not occur naturally in the species. Examples in food crops include resistance to certain pests, diseases, environmental conditions, reduction of spoilage, resistance to chemical treatments (e.g. resistance to a herbicide), or improving the nutrient profile of the crop. Examples in non-food crops include production of pharmaceutical agents, biofuels, and other industrially useful goods, as well as for bioremediation.[


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Answer 2

1.Crops developed with desired characters by integrating foreign gene with their genome are called as genetically modified crops.

2. high yeilding varieties with resistance to disease , alkalinity , weeds other stresses like extreme cold and drought are produced .

3. The gene had been isolated from the bacterium Bacillus Thurigiensis and integrated with the gene of cotton and brinjal.

4. this improved variety - BT cotton , BT Brinjal killsthe pests and yield is maintained .

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