What was the name of the first cloned mammal?

The first mammal cloned from an adult somatic cell was Dolly, a Finn-Dorset sheep born in Scotland in 1996.

Researchers at the Roslin Institute used somatic cell nuclear transfer. They removed the nucleus from an unfertilized sheep egg and replaced it with the nucleus of an adult mammary-gland cell. The reconstructed egg was stimulated to divide and implanted into a surrogate ewe. Dolly therefore had three genetic or biological mothers: one supplied the egg, one supplied the DNA, and one carried the pregnancy.

Dolly was not the first animal ever cloned. Earlier experiments had cloned frogs and mammals from embryonic cells, but Dolly was the breakthrough because her DNA came from a mature adult cell. The result showed that an adult cell nucleus could be reprogrammed to produce an entire animal.

Dolly was born on 5 July 1996 and publicly announced in February 1997. She lived until 2003, produced six lambs, and is now preserved at the National Museum of Scotland. Her name honored singer Dolly Parton because the donor cell came from a mammary gland.