Genetically modified organism (GMO) are any cell of plants, bacteria, algae, fungi and animals, whose DNA or genes are artificially designed and altered with desired gene. GM crops, are those whose DNA has been modified to get desired effects.
Advantage of GM crops has following:

1. Genetically modified crops are more tolerant to abiotic stresses such as heat, salt, cold, drought etc.
2. Because they are resistant to pest so reduced in dependency on agrochemicals e.g., pesticides.
3. Genetically modified crops have high yield so due to resistancy post harvest losses are greatly reduced.
4. GM crops are able to use maximum minerals of soil, which prevents fertility of soil by early exhaustion and keep the soil healthy.
5. The second generation GM crops have increases nutritional value of food and beneficial for consumers, e.g. golden rice are enriched in vitamin A, soyabeans with increased oleic acid.
6. Second generation GM crops can be transfered and stored for long time without decaying of product.

The purpose of genetic engineering is to produce Tailor made plants, which means plants grow for specific purpose with high yield, good nutritional value and resistant from several diseases. Tailor made plants supply enough alternative resources to industries in means of fuels, pharmaceuticals, starches, carbohydrates, proteins etc.