Because of this scientific advance, the prospect of human cloning quickly became a hotly debated ethical issue. As the debate developed it also became common to distinguish reproductive cloning from therapeutic cloning, each being subject to slightly different ethical assessments. Mammals have two kinds of cells: a somatic cell and sex cells. The SCNT process works as follows: The nucleus is removed from a somatic cell of either a female or a male. An unfertilized ovum is taken from a female and has its nucleus removed and then, replaced with the somatic cell nucleus. The resulting ovum with a somatic cell nucleus is then, stimulated and implanted in a female womb to grow to term. The resulting offspring are genetically identical to the individual that was the source of the original somatic nucleus (McGee, Glenn …show more content…
There are some types of natural cloning, those of nature displays. Some animals have massive powers of regeneration. If the body of certain starfish is cut up into its five arms, each arm will regenerate a complete individual. Another type of asexual reproduction found in all animals as well as in human beings is the formation of identical twins, triplets, and so on. Identical twins create a clone. The growth of a tumor in the body of an individual twin is, in effect, the formation of a clone of malignant cells. Humans have learned from nature and started their cloning. Cloning, a word that a few years ago was the subject of scientific novels and movies. That was all changed in 1997 when scientists at the Roslin Institute in Scotland produced Dolly. Dolly was a sheep and the first cloned mammal. Before Dolly, cloning had been studied since the 1950s. In 1952, the Institute of Cancer Research successfully cloned a leopard frog, by using an embryonic frog cell (Aldridge, Susan