One of a kind: what did Dolly the sheep really do for us?
D053687:Adult Stem Cells; D000818:Animals; D019976:Cloning, Organism / Q000639:trends; D033041:Embryo Research; D004622:Embryo, Mammalian / Q000166:cytology; D053595:Embryonic Stem Cells; D006801:Humans; D053652:Nuclear Transfer Techniques; D012756:Sheep