Even though such cells are post-zygotic, they clearly represent a development phase characterized by incomplete separation of the germline and the soma (Starr, Evers, & Starr, 2013). In essence, such cells usually have the capacity to give rise to both the germline and somatic cells. Apparently, a transgenic animal is normally produced when a foreign DNA molecule is introduced into the cell of an animal through artificial means. The transgene (the foreign DNA molecule) may contain just one or several genes. The transgenic animal produced upon inserting a transgene into the already fertilized cells or the oocyte from the early embryo will be able to transmit the foreign DNA in its germline (Starr, Evers, & Starr, 2013). Genetic engineering pundits have created different types of transgenic animals, including transgenic fish, transgenic frogs, transgenic Drosophila, and a wide variety of transgenic mammals such as rats, mice, and livestock.