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I. Identification
Dolly the Cloned Sheep
Although Dolly is a clone, she is not a true genetic clone of one sheep, since she does not have precisely the same genetic makeup as the adult sheep she was cloned from. This is because Dolly’s cells, from the adult udder’s sheep, are not the same as the egg, with which it was merged. It was shown that at least 99.5% of her cells came from the egg. Therefore, there can be physical differences between the two animals (Cloning Report: Dolly's Mixture 1). It is also appearing Dolly is suffering from cellular aging, developing twice as fast as a normal sheep. It was discovered her chromosomes are shorter than normal sheep of the same age (Cloning Report: Clones May Grow Old Before Their Time 1).
Reproductively Dolly has had four healthy lambs. Last year she had one baby, named Bonnie. This year she had triplets, who remain unnamed. All offspring of Dolly have been conceived naturally, fathered by David, a Welsh mountain ram. This was to demonstrate Dolly can reproduce naturally and to check for any unexpected genetic changes in offspring.
Cloning Other Animals...
Mice
Cows
To create the cows the Japanese harvested nuclei from two types of cells, 6 from cumulus (surrounding eggs inside the ovaries) and 4 from oviductal cells (the lining of a cow's oviducts). The nuclei were transferred into ten donor eggs from one cow. The eggs were grown in the lab to the early embryonic stage, then implanted into 10 surrogate cows. Each calve is a duplicate of the one cow from which the cells were removed. At least 15 calves were cloned using Dolly's technique. Japanese researchers say they have a 23% success rate with oviductal cells, and 49% success with cumulus cells. American researchers have also cloned calves from cells taken from unborn cows, with a 12% success rate (The Perfect Cow 1).
Monkey
Pigs
The cloned pigs were created by removing a cell from a hog, removing genes that trigger human immune systems and inserting cells to genes that make the cell more human, fusing the altered cell with a gutted egg until the embryo stage, transferring the cell to a mother and waiting for a litter of identical clones to be born. Therefore, today's pig farms may be tomorrow's human organ banks - for kidneys, hearts and lungs needed by tens of thousands of patients. One analyst predicted a market of over $6 billion (Weiss "Transplant" A1).
In sum, here is a table of recently-cloned mammals.
Besides animals, GMOs include food and seed biotechnology, which allows scientists to modify (transfer single or small groups of genes) crops, fruits and vegetables in order to develop foods with beneficial traits, such as improving taste, speeding up the ripening process and increasing resistance to insects. Globally there were over 69 million acres of GMO crops planted in 1998, 15% in developing countries (GMO Fact Sheet). It has been estimated that as much as 60% of food products currently sold in the U.S. contain some mix of GMO and organic products (GMO Fact Sheet). Currently no special labeling is required for products containing GMOs, since the Food and Drug Administration (FDA) in the U.S. does not regulate food products based on the process in which they were created. Only foods whose nutritional value or composition has been significantly altered or contain allergens require mandatory labeling (GMO Fact Sheet).
Ethics
Recently a South Korean infertility clinic of Kyunghee University Hospital in Seoul, led by researcher Lee Bo-Yon, said he had cloned a human embryo, but destroyed it. If cloning of humans were allowed, at least one Harvard-educated physicist announced in 1998 that he was ready to set up a clinic to clone human babies and predicted up to 200,000 human clones per year could be produced once his technique was perfected. But for now human cloning remains an unpracticed and taboo issue.
Cloning of animals is already reality. The possibilities for health research include being used for research to prevent cancer, AIDS, diabetes, multiple sclerosis, leukemia, Parkinson's, and Alzheimer's (Researchers Clone First Mammals from Adult Cells Using New Technique 1). It could also improve our understanding of cellular and molecular activities in ageing and provide organs for transplant. But these uses also present numerous ethical dilemmas that are far from resolved.
Since the birth of Dolly, there has been a plethora of other cloned animals. U.S. researchers in Honolulu, Hawaii successfully cloned 5 generations of mice using a new micro-injection technique, different than Dolly's technique. All of the babies were healthy and reproductive (Researchers Clone First Mammals from Adult Cells Using New Technique 1).
Cows were the next link in mammal cloning. In 1998 Japanese researchers cloned eight genetically identical calves to boost country's beef and dairy industries using techniques similar to Dolly's. Japan could use this method for economic benefit, "duplicate[ing] cows that are proven to be ideal milk and meat producers," said the researchers (The Perfect Cow 1).
Tetra– a female monkey - was cloned from splitting a very early embryo into four pieces. This is amazing because Tetra is an identical clone, not like Dolly, who has genetic material from both the cell and egg that was hollowed out. Gerald Schatten, who led the research, split the embroyos after they reach an eight-cell stage. They were split into four parts. Each part had two cells. From these two cells came new embryos that were implanted into different mothers. Schatten called his method "artificial twinning." (Tetra, the Cloned Monkey, is Born 1)
The first litter of five cloned piglets were born in March 2000, and there are high hopes that one day pig organs may be a suitable transplant for human organs. But first there are many hurdles to overcome before this becomes reality. Scientists have been successful in combating some of the pig's genes, to make the cells "less pig-like" and now a pig's gene is "about 95 percent human (Weiss "In Organ Quest" A7)."
History of Mammal Cloning
  Animal Country Year 1. Sheep Scotland 1996
2. Mice USA 1998
3. Cows Japan, USA 1998
4. Monkey USA 2000
5. Pigs USA 2000
GMOs
In short, the issue of cloning comes down to ethics. Almost everyone, even Wilmut, believe human cloning is out of the question. "There is no reason in principle why you couldn't do it [with humans]. All of us would find it offensive." (Right or Wrong 1) In addition, there are so many unknowns: Could clones be allowed to clone themselves? Would it be a tool for the rich? And it is pertinent to remember that clones would not be exact replicas; they will develop differently because of different environments.
3. Related Cases