LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY LEWIS HOUGHTON / SCIENCE PHOTO LIBRARY
Dolly the sheep on display in Edinburgh's Royal Museum, following her death in February 2003. Dolly was the first sheep to be cloned from an adult cell, the result of research conducted by Professor Ian Wilmut at the Roslin Institute in Edinburgh, Scotland. Wilmut's work involved taking an egg cell from a Scottish Blackface (SB) ewe and removing the cell nucleus. Next, an adult cell from the udder of a 6-year-old Finn Dorset ewe was cultured and then injected into the enucleated egg cell. A spark of electricity then fused the udder cell with the egg cytoplasm and stimulated the egg to grow into an embryo in the womb of a surrogate SB sheep. Dolly was born in July 1996.
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