" In July 1997, building upon their success of the creation of dolly, the first animal cloned from adult cells, Ian Wilmut and Keith Campbell created Polly, a Poll Dorset lamb cloned from skin cells grown in a lab and genetically altered to contain a human gene. Polly's birth signified the first step in the application of cloning technology to the production of a useful product. Most scientists believe that most beneficial application of cloning will come from the exact reproduction of animals genetically altered to produce human proteins or organs more easily accepted in transplants. Wilmut and Campbell's creation of Polly surprised the scientific community by how fast cloning technology was progressing. The cloning of genetically altered farm animals was not expected for another five year."
( from : http://library.thinkquest.org/24355/data/details/1997b.html )
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