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The future of cloning

It is now possible to make clones, or exact genetic copies, of sheep, cows, goats, mice and, probably, humans. This opens the way towards the production of replacement body parts from adult cells.

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Figure 1: Nuclear-transplantation techniques in mammals.
Figure 2: Cloned frogs.
Figure 3: Steps involved in therapeutic cloning.
Figure 4: Countries in which anti-cloning legislation has been, or will shortly be, passed.

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Correspondence to J. B. Gurdon or Alan Colman.

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Gurdon, J., Colman, A. The future of cloning. Nature 402, 743–746 (1999). https://doi.org/10.1038/45429

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