History of Somatic Cell Nuclear Transfer (Cloning)

Dolly the sheep - first cloned mammal
      • 1952 – Briggs and King cloned tadpoles
      • 1996 – The first mammal cloned from adult cells was Dolly, the sheep.
      • 1998 – Mice cloned
      • 1998 – Cows cloned
      • 2000 – Pigs cloned
    Cloned pigs Cloned cows
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Slide 13 of 63


Cloning of non-mammals was first accomplished in 1952. However, cloning of mammals proved much more difficult, with the first successful clone being the sheep, Dolly. Dolly died a premature death, probably due to the use of aged chromosomes in her nuclear transfer. Other mammal species followed rapidly, with mice and cows being cloned in 1998, and pigs in 2000.


Last Modified July 6, 2004