... had imagined. That was because Mr. Wainwright taught the pupils about the system, and Mr. Thompson taught biology. Stan also meets with the polluted pond, and the pines that had changed colour. Furthermore he saw how Althea had turned immune to the gunk in the pond, and how she ate the frogs that lived in it. But the last straw that broke the camel's back, was when he saw how ... Althea had been engineered for nictitating membranes. It was so she could see the frogs under the water. That was too much for Stan, he ran off with ... the echo of his scream, "mutants", hanging after him Wor...

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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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• Grade Level: High School

... there are eight million human clones living on earth. Identical twins have the same genetic information due to the embryo splitting during early development producing two organisms, therefore making them clones. Cloning has a short but rather amazing history. People actually attempted cloning at the beginning of the 20th century. Sea urchins, frogs, sheep and other organisms were used to try to perfect cloning. Cloning ... has been attempted many times. The first attempt was made by Adolf Eduard Driesch. Driesch could let the eggs of a sea urchin into a two-blastomere stage. Then he sepa...

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... of a sick person's tissue or organ to then be transplanted back into the person that supplied the DNA. This process would be superior to organ transplants from donors. The supply would be unlimited and there would be no waiting lists. Cloning dates back to the nineteen seventies when frogs and toads were experimented on. The first gene was cloned in nineteen seventy-two. Scientists isolated ... the gene and then bound it to yeast. The yeast incorporated the gene into its own DNA and multiplied, producing many ... copies of the gene. Just recently scientists cloned a sheep. The cell fro...

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• Has Bibliography
• Grade Level: High School

... . This is because tomatoes must be picked before they are ripe to prevent them from rotting during shipping. Even though, vine ripening is the secret to success it has not been possible, until now. Genetic engineering was once thought of to be impossible, but today we are capable ... genetic engineering is imprecise and unpredictable. By inserting genes from organisms that have never been eaten as food, new proteins are introduced into the human and animal food chains. There is concern that these could cause serious environmental problems, or worse it can cause health problems to ... f...

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... 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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... and brings it to life through the process of cloning. In 1938 a German scientist Hans Spemann proposes a "fantastical experiment" to transfer one cell's nucleus into an egg without a nucleus, the basic method that would eventually be used in cloning. Fourteen years later in 1952 Briggs and King clone tadpoles. Another scientist John Gurdon clones frogs from differentiated cells in 1962. In ... 1969 Shapiero and Beckwith isolate the first gene. By 1973 Cohen and Boyer create first recombinant DNA organisms. 1978 ... , the release of David Rorvik's book, In His Image: The Cloning of a man...

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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...

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• 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