Can Humans Be Cloned?

Since 1997 when Scottish scientists announced the successful cloning of a sheep, the advancement in technology that made Dolly possible raised many questions about cloning. Obviously, the major question on everyone ‘s mind is whether the same techniques can be used to create human “copies”. This particular question has raised great controversy, as well as a number of other technical and ethical questions, and the polemic still continues.

There were various reasons invoked in favor of cloning, such as helping infertile couples produce genetically related offspring, or bringing the deceased back to life. Since the process of cloning humans should be the same as that of cloning a sheep, biologists believe that humans could really be cloned. For more details please visit these sites:-

However, the ethical concerns involved in human cloning do not necessarily apply to the cloning of animals, so it is not quite the same thing. First of all, most of the time cloning fails to work, as many embryos die after being implanted in the uterus. Or even worse, a large percentage of the offspring die either before, or shortly after birth. Not to mention that many of the animals that survive struggle with defects in their hearts, lungs or other organs and malfunctioning immune systems. Experiments conducted on animals are not ideal either, but they are necessary for the progress of science. But one cannot take the same chances and risk so many failures for one success, especially since one such failure would imply the death of a human being.

A second type of human cloning would avoid some, however not all ethical issues. In therapeutic cloning, a nucleus taken from a person is inserted into a donor egg, in order to form an embryo with that person ‘s DNA. The embryo is not implanted into a woman ‘s uterus to grow a baby, but is allowed to divide several times in order to produce stem cells. Then, the stem cells are removed and used to grow any type of tissue, which can be implanted to the donor of the original nucleus. A major problem in organ tissue transplants is that the cells can be rejected by the immune system, but with this therapeutical cloning, the stem cells are genetically identical so the immune system accepts them.

Numerous other ethical concerns revolve around this topic, and a human clone has not yet been created. Still, according to scientists, it is possible to create copies of people by cloning.


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