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l conditions, certain pests, chemicals, or even spoilage as an example of characteristic traits that technology in genetic engineering aims to introduce in a plant. Hillstrom (2012) explains that GM crops are always generated in a laboratory, and this is through an alteration of the genetic makeup of the crops. To achieve this objective, Hillstrom (2012) explains that scientists will add one, or more genes to the genome of the plant, by using techniques of genetic engineering. Arvanitoyannis (2005) manages to explain that majority of genetically modified crops are produced through the biolistic method, or through the mediated transformation of Agrobacterium tumefaciens.

Arvanitoyannis (2005) further denotes that crops that are modified and developed by the use of the GM technology do not have any changes that was not intended by the scientists, while producing the crop under consideration. The tobacco crop plant is the most genetically modified crop. This is because tobacco is easy to propagate, and there is an extensive study of its genomes. On this basis, Arvanitoyannis (2005) explains that the tobacco crop plant serves as a model for other species of plants.

In using the biolistic method to create a genetically modified plant, Healey (2010) explains that the DNA material is bound to a tiny particle of tungsten or gold, which are then shot to the single plant cell or plant tissue under high pressure. After this occurs, the accelerated particles are able to penetrate the membrane and cell wall of the plant. The DNA thereafter separates from the metallic substances and is then integrated into the genome of the plant, within its nucleus. This method is widely used in the genetic production of cultivated monocots, such as maize and wheat.

Arvanitoyannis (2005) denotes that genetically transforming these substances by the use of Agrobacterium tumefaciens has not always achieved success. However, one of the major disadvantages of using this technique is that it can