Overview
- On July 5, 1996 researchers at the Roslin Institute produced Dolly by somatic nuclear transfer after 277 attempts, proving an adult cell nucleus can be reset to produce a whole animal.
- Dolly’s success helped shift scientific focus toward cell reprogramming and indirectly paved the way for Shinya Yamanaka’s development of induced pluripotent stem cells used across medicine and research.
- Cloning now appears in farming, elite animal breeding, pet reproduction, xenotransplantation research and experimental conservation projects such as efforts to save the northern white rhino and private programs using gene editing to recreate mammoth traits.
- The technique remains inefficient and harmful to animals, with low birth success rates (about 2% reported for dogs), frequent severe impairments in clones, and high demands on egg donors and surrogate mothers.
- Regulatory limits reflect those concerns: Germany bans commercial cloning under its animal‑welfare law, EU rules restrict animal experiments, and Dolly’s preserved body is displayed in Edinburgh as a reminder that cloning alone cannot restore wild populations or genetic diversity.