Genetic engineering is the process of modifying an
organism’s genetic composition by adding foreign
genes to produce desired traits or evaluate function.
By introducing of “foreign” deoxyribonucleic acid
(DNA) into preimplantation embryos, transgenic
animals are produced. The foreign DNA is merged
with the genetic material and may be expressed in
tissues of the obtained result. This technique is of
great importance to many aspects of biomedical
science including gene regulation, cancer research, the
immune system, developmental biology, biomedicine,manufacturing and agriculture.
The production of transgenic animals is one of a
number of new and developing technologies that will
have a profound impact on the genetic improvement of
livestock. The first transgenic animals contained
foreign DNA that was passed on to offspring