Genetic engineering is the branch of science in which techniques are used to change the DNA codes in Genetic material. DNA is the thread like material present in the chromosomes of every cell. DNA contains all the genetic material. This contains all the genetic information and governs cell growth. Genetic engineer works on changing the sequence of genetic material by using artificial methods. They study on the genetic disorders, examine the traits, generations and soon. They use all techniques to change the color, size, resistant to the disease. It is the successful field where the researcher has made the changes. They conduct survey and experiment on the human, plant, animals to correct the defect of the generations. It has got its own demand where only interested and the one who loves the subject and practical theories will opt genetic engineering as their career.