... cell is removed and placed in the somatic cell. This is impossible in humans right now because the somatic cells are specialized and there are many genes that have been switched off in them that we do not know how to turn them back on. This was done with frogs however. The eggs were implanted with the nuclei from the intestinal lining of tadpoles. Most of ... these frogs died or grew into monsters. Of the ones that did grow normally they were sterile. Embryo splitting or blastomere separation is what is most commonly referred to ... as human cloning. Embryos in the early stages of deve...

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• Grade Level: High School

... adult differentiated cells cannot be used to clone an organism."" (http://library.thinkquest.org/C0122429/history/1952.htm). In 1962, John Gurdon claimed to have cloned frogs from adult cells. His experiment demonstrated that cells retain the ability to form different tissues even after they specialize. Yet, mistakes were found in his work. "Dennis Smith pointed out that there were some undifferentiated ... sex cells in the intestines of South African frogs, so the tadpoles Gurdon cloned may very well be cloned from those undifferentiated cells."" (http://library.thinkquest.org/C0122429...

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• Approx Pages: 8
• Grade Level: High School

... frog cell, and then allow the egg to develop into a tadpole. This "Nuclear transfer" transplants an animal gene into an egg. The tadpole is therefore a clone of the embryo that donates its nucleus. In 1975 scientists got tadpoles after transferring cell nuclei from adult frogs. Over a decade later, in ... 1986, a sheep was cloned by nuclear transfer of embryonic cells. Dolly, the first cloned sheep was introduced to the world. In 1998 more than 50 mice were reported cloned from a single ... for clinical trials in patients with irreversible brain and spinal damage. Reproductive cloning ...

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... to cloning which the people who want to move on with the process would like to ignore. What people fail to remember is that this is not yet a perfected science. Hundreds of frogs and other animals did not survive the initial experiments proving to those who are nave to the truth that this ... is dangerous. If you will remember a few years back to 1996 when Dolly, a sheep, was cloned. Dolly was the lone survivor of many experiments. I cannot ... to do this when we are possibly jeopardizing human lives? Another disadvantage is that cloned human being would have the carbon copy of the gen...

• Word Count: 1576
• Approx Pages: 6
• Grade Level: High School

... of a clone as a later born identical twin. They will be indistinguishable in biology from any other human being. Many people believe that clones will be used as spare parts for the rich in need of a liver or some other organ. There are also beliefs that these clones will be headless as well as be killed without committing murder. In reality using ... way, there is a new method of reproduction called cloning. There are two methods of cloning. The first, called embryo cloning, has been achieved years before in frogs, other amphibians, mammals, and once it was tried with humans, however bo...

• Word Count: 1536
• Approx Pages: 6
• Grade Level: High School