To brief the history of cloning, I'm going to summarize its history in the following few lines. Scientists used nuclear transfer, in 1952, with the purpose of studying the early improvement in frogs. In the 1980's, they used cells taken straightly from early embryos, in the same procedure, to clone cattle and sheep. In 1995, scientists used embryo resultant cells that had been cultured for more than a few weeks in creating live lambs and it was the first time when live animals had been resulted from cultured cells. By the year 1996, the first cloned animal was cloned from a differentiated somatic cell that was taken from an adult animal and was called Dolly. Moreover, over 50 mice were cloned using nuclear transfer in August 1998. Since that time, scientists began to clone cattle, sheep, mice, goats and pigs. In 1998, a Korean group of scientists announced that they had used nuclear transfer to clone a human embryo. However, there is no evidence of successful redoing this experiment (www.bioethics-singapore.org/bac/detailed.jsp?artid=14&typeid=2&cid=17&bSubmitBy=false, 2002)
             To define and clarify cloning, it's believed that the somatic cell nuclear transfer is the fundamental process for cloning. "It involves transferring the nucleus of a cell to an unfertilized egg whose inherited materials are removed. The egg is the 'reconstructed embryo' that is set in motion to grow by a short electrical beat". (www.bioethics-singapore.org/bac/detailed.jsp?artid=14&typeid=2&cid=17&bSubmitBy=false, 2002)
             The procedure of cloning occupies dividing a DNA series of interest to get multiple copies of it in an organism, usually a bacterium that is capable of increasing over unlimited periods. DNA can then separate in a pure form for comprehensive molecular examination (www.csu.edu.au/learning/ncgr/gpi/odyssey/cloning/mclo_def.html, 2002)
             Hence, cloning has become a huge problematic issue in our society. More and more people a...