... cloned mammal which was a healthy lamb by the name of "Dolly". A process called somatic nuclear cell transfer accomplished this task. For example, a cell is first taken from a donor female, then an unfertilized egg is taken from a second female, DNA from the cell is removed and transferred to the egg which is implanted into a surrogate mother, and finally the resulting baby is genetically identical to the ... (Global change). Many Senators support the research, but not the actual reproductive cloning and are currently trying to pass bills protecting the rights for research. "Human Clonin...

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... the late 1800's. Dreisch's original goal was not to create identical animals but to prove that genetic material is not lost during cell division. Dreisch's experiments involved sea urchins, which he picked because they have large embryo cells and grow independently of their mothers. ... did not simply break off a cell from an embryo, however. They took the nucleus out of a frog embryo cell and used it to replace the nucleus of an unfertilized frog egg cell, completing the "fantastical experiment" of nearly 50 years before. Once the egg cell detected that it had a ... . Take an egg and ...

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... it was tried with humans, however both attempts to do this with the humans failed. The second method of cloning is achieved by using an adult cell, not an embryo. To do this scientists remove an egg cell from a female, and remove the chromosomes, nucleus, etc, leaving no way for the mother to interfere with the genetic part of the reproduction. However, the ... placed next to each other, and electrical charges are emitted into them. These electrical charges make the two fuse, or combine together. After about 6 weeks, the egg cell, now artificially fertilized, is placed back into the ute...

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... . This process consists of transplanting, or injecting, the nucleus of an adult body cell into an enucleated egg (oocyte) of another animal or person. Convinced that past efforts to clone mammals failed because the donor cell that supplied the nucleus and the recipient egg were at different stages of the cell cycle, Wilmut et al. cut the supply of nutrients and thereby induced the donor ... to be cloned. They would then extract the nucleus by means of a fine needle from the eggs and put the recently vacant egg and the cloner's cells next to each other, and zap them with electricity. Theo...

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... same person. It involves transferring DNA from a person's cell to a genetically blank egg. Scientists would need two cells. One cell is a body cell from the individual the wish to clone. This cell contains the DNA that will make the clone. It is a somatic cell, which is a cell from an organ or tissue. The second cell is an unfertilized egg. The nucleus is removed from the egg so it no longer contains ... any genetic material or DNA. The somatic cell which has the genetic code is starved of nutrients. Because of this the cell enters a suspended state. While the somatic cell is in this sta...

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... are connected to a special fusion chamber that is placed on the stage of a microscope so that the technician can properly position the donor cell and enucleated egg. 8. The egg and the donor cell are placed in the fusion chamber between 2 electrodes. A low electrical current is passed across the positive and negative electrode. This electrical ... different times. The concept of cloning conceptually is very simple. What you really start out with is an [oasite], (an egg cell) and what you do is you suck out the chromosomes, the DNA that are responsible for the various traits that each of ...

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... , derived from another organism by an asexual reproductive process (Church of Scotland, 02). With other techniques scientists can isolate sections of DNA representing single genes, determine their nucleotide sequences, and reproduce them in the laboratory. This offers the possibility of creating entirely new genes ... Parkinson's or Rett Syndrome. * Here's how therapeutic cloning works: DNA is extracted from a sick person. The DNA is then inserted into an enucleated donor egg. The egg then divides like a typical fertilized egg and forms an embryo. Stem cells are removed from the embryo. ...

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... cloning ("Wachbroit") it did not hold back scientist from continuing the task of successful cloning. The process of human cloning is very difficult. It involves inserting DNA into an unfertilized sheep egg to produce a lamb with identical DNA ("Wachbroit"). Many ethical, religious and legal issues have arisen from the possibility of human cloning ("Genetic Encores"). In many countries there have been laws placed ... called "twinning" after the naturally occurring process that creates identical twins) involves splitting a developing embryo soon after fertilization of the egg by a sperm (...

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... animals (Levine 1). In 1938, Hans Speman proposed cloning a mammal by transplanting an adult cell's nucleus into a fertilized egg. This process is called nuclear transfer and was initially used to clone a frog in 1952 (Sinha 59). Using this process, nuclear DNA from the body cell of a donor frog was injected into the egg cell of a recipient frog whose nuclear genetic material was removed. The fused cells divided ... just like a normal fertilized egg and formed an embryo that was genetically identical to the donor frog. In 1980 mice were successfully ... Institute, accomplished this fea...

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... . As defined in the text, a somatic cell is "any cell in the body except a germ cell," and contains the same entire set of DNA. Dolly's story is revolutionary, in that, before her birth, it was deemed unfeasible to make a somatic cell differentiate as if it were a fertilized egg. Dolly, conversely, changed that notion. She was created by taking a somatic cell from the udder of a white-faced sheep ... and depleting it of all nutrients so that it ceases to develop. It is then electrically fused with an egg taken from a black-faced sheep. The egg, having had its nucleus removed, is stripped...

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... in a few different ways but it is basically making an exact copy of something else out of there DNA. Cloning is the biggest step in genetic engineering since the structure of the DNA double helix. Cloning is a very controversial issue and has many great sides and also many bad sides. The ... cloning will change the future. There are three different types of cloning. First there is Embryo cloning, where you are adding a cell from an embryo and replacing it into another fertilized egg, making either twins or triplets ("Human" 1). This practice has been done on many various animals but has ...

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... of human life and it's regeneration 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 ... a fatal disease could wipe out the human race. In order to have a better understanding of cloning it is important to understand that cloning has three different divisions: embryo cloning, adult...

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... of human life and it's regeneration 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 ... a fatal disease could wipe out the human race. In order to have a better understanding of cloning it is important to understand that cloning has three different divisions: embryo cloning, adult...

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... various ways that may help or harm society as a whole. What Is Cloning There are three types of cloning that exist, reproductive cloning, DNA cloning, and therapeutic cloning. The American Heritage Dictionary has three different definitions for cloning. 1) A cell, group of cells, or organism that is descended from and genetically identical to a single common ancestor, such as a bacterial colony whose members arose ... an identical genetic twin of an organism is produced. Reproductive cloning is how animals are cloned today. When you have a reconstructed egg after somatic cell nuclear tr...

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... varying in complexity. The procedures are as follows: At the simplest level of cloning lies "molecular cloning", where molecular biologists regularly make clones of DNA fragments to further their research. The availability of large quantities of identical DNA allow for less variables within experiments, thus making experiments unproblematic. Molecular cloning has led to the "production of insulin to treat diabetes, and tissue ... was at this time shared with the press, and Dolly was physically displayed to the media. Dolly was the first successful attempts of 276 (Fiddler, 182). She was ...

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... started in 1997 by Rael, the leader of the Raelian movement who believes that extraterrestrials created human life on earth. They say that extraterrestrials used DNA and genetic engineering to create all life on earth. Until lately there wasn't a federal law against human cloning in the United States. Recently the ... process that was used to make Dolly. They will first remove the nucleus of an egg which makes an enucleated egg. A cell that contains DNA will be taken from the person to be cloned. Next, the egg and the cell will be fused together using electricity. This process creates an ...

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... of them was infertile. In the case of an infertile father, scientists take an egg from the mother, remove its nucleus, then take a cell from the father, remove its nucleus, and place the nucleus inside the empty egg (Kolate 242). That cell then acts as a reproductive cell. Next, they then place the egg in the mothers' womb to impregnate. "Mark Sayer, an infertility expert at Columbia ... Presbyterian Medial Center in New York, would like to take each cell from an early human embryo and clone it, making identical twin embryos in the woman's uterus immediately, and freeze any extras for f...

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... . The cells turn off their active genes, and go into hibernation. An unfertilized egg is then taken out of an adult ewe, and the eggs nucleus, along with its DNA, is sucked out. Thus leaving an empty egg cell that still has the cellular machinery to produce an embryo. The empty egg and the culture of the starved cells are then placed next to each ... other. An electronic pulse causes the egg and cells to fuse together, and a second pulse is given to ... start the cell division. Six days later, the embryo is implanted in the uterus of another ewe. The result of this process is the birth ...

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... identical twins are all clones of each other. "In fact, you probably know some clones. Identical twins are clones of each other, both of them came from the same fertilized egg cell" (Berger). As long as genetic make up is the same they are clones and a splitting embryo that creates and two identical are new in genetic variation and unique from anything ... dangerous narrowing of diversity in the gene pool. As it is pointed out "mutations are passed along in a line of cells-from parent cell to daughter cells as the original DNA mistake is copied over and over in subsequent DNA replicatio...

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... animal was successfully cloned, on that history-making day the cloned sheep named Dolly was born. Wilmut took a cell from the udder of a six-year -old ewe and sparked a jolt of electricity to fuse it to the egg of another sheep, which was then implanted into a third female. The only questionable aspect of the experiment was ... dies after she is no longer able to have babies. Her dead child could be cloned, producing another child that would be of the same DNA, hers. Also, in the cases of homosexual men or women, a clone can be produced from one of the partners, rather than having a sp...

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... and how it got to be the large-scale discussion it is today. In 1938, Hans Spemann thought of a "fantastical experiment" to transfer one cell's nucleus into an egg without a nucleus. That is the basic thought in the process of cloning. In 1944, Oswald Avery discovered that genetic information was carried by the nucleic ... a clone of a monkey was done in March of 1997. That brought the cloning close to humans due to the relative likeness between primate and human DNA. There are many benefits to cloning. Many of the reasons people really want to see the cloning continue are the medical ben...

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... scientist in the world to clone an animal. It was a sheep named Dolly. Since then, Wilmut has succeeded in turning a cows" skin cell into a heart cell. "These were the first people to clone an animal, the first to change the genetic structure of a cloned animal. Now they are the first ... cloning of dolly. Using somatic nuclear transfer, Wilmut and his team of researchers inserted the nucleus of an adult udder cell into a sheep egg cell whose nucleus had been removed. When the egg with the new nucleus begins to divide, Wilmut implanted the developing embryo into the uterus of another shee...

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... transfer involves the use of two cells. The receiving cell is normally an unfertilised egg taken from an animal soon after ovulation. The donor cell is the one to be copied. A scientist removes the chromosomes, a chain-like substance that incorporates the cell's DNA, from the recipient egg cell. The donor cell is then combined with the recipient egg. Some fused cells start to develop like a normal ... embryo and produce progeny if implanted into the uterus of a surrogate mother'. Then on October 13th 2001, human cloning research had an even bigger breakthrough. Cloned early-stage human ...

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... exact copy of an adult sheep in a process called cloning. What the researchers actually did: they took an unfertilized egg cell from a female sheep and removed the entire DNA (genetic information) from the nucleus that is needed to produce an embryo. Next, they took a cell- that carried the genetic code from both its parents-from another sheep that they wanted to clone and put ... endocrinologist and infertility specialist Daniel A. Dumesic, M.D., said that it would be the same technique that was used by Scottish scientists to clone the adult sheep Dolly and is called somatic cell nucle...

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... exact copy of an adult sheep in a process called cloning. What the researchers actually did: they took an unfertilized egg cell from a female sheep and removed the entire DNA (genetic information) from the nucleus that is needed to produce an embryo. Next, they took a cell- that carried the genetic code from both its parents-from another sheep that they wanted to clone and put ... endocrinologist and infertility specialist Daniel A. Dumesic, M.D., said that it would be the same technique that was used by Scottish scientists to clone the adult sheep Dolly and is called somatic cell nucle...

• Word Count: 2707
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