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建立人际资源圈Dolly_The_Sheep
2013-11-13 来源: 类别: 更多范文
Dolly The Sheep
Sufficient information concerning the techniques and practices involved in cloning is required for forming a worthy argument of whether or not cloning entire organisms should be commonplace. Because ethics and morals are often jumbled in this popular debate, it is fair to firstly understand the procedure.
In the article, Should We Clone Humans' in the textbook, the two known methods for cloning whole organisms are discussed. Embryo splitting is one way, where undifferentiated cells in a fertilized egg are separated and implanted into a different mother. The result of this placement is eight identical clones of the offspring that would have been the outcome of the original egg, had it fertilized naturally. This method of cloning, however, does not produce an exact replica of either parent, as in the case of Dolly, the Scottish white-faced sheep, because the splitting is done after the union of sperm and egg.
Dollys birth, explained in detail in the article Cloning: Will There Ever Be Another Ewe', was the result of cloning using a technique known as somatic cell nuclear transfer. As defined in the text, a somatic cell is any cell in the body except a germ cell, and contains the same entire
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