Application of Genetic Engineering (With Diagram) ADVERTISEMENTS: Some of the most important application of genetic engineering are as follows: For many years, the gene has been thought of as a unit of structure, its definition based on the results of recombination experiments and the analysis of mutant cells. According to this older view, a gene was the smallest unit of inheritance  Genetic engineering - Revision 1 - National 5 Biology Genetic engineering is the transfer of DNA from one organism to another using biotechnology. The organism receiving the DNA is said to be genetically modified (GM). Organisms are genetically modified in order to give them a combination of genes (genotype) that will result in them having desirable What is genetic engineering? | Facts | yourgenome What is genetic engineering? Genetic engineering, sometimes called genetic modification, is the process of altering the DNA in an organism’s genome. This may mean changing one base pair (A-T or C-G), deleting a whole region of DNA, or introducing an additional copy of a gene.