how long did the cloned sheep dolly live
Dolly (sheep) On 14 February 2003, Dolly was euthanised because she had a progressive lung disease and severe arthritis.[15] A Finn Dorset such as Dolly has a life expectancy of around 11 to 12 years, but Dolly lived 6.5 years. A post-mortem examination showed she had a form of lung cancer called ovine pulmonary adenocarcinoma, also known as Jaagsiekte,[16] which is a fairly common disease of sheep and is caused by the retrovirus JSRV.[17] Roslin scientists stated that they did not think there was a connection with Dolly being a clone, and that other sheep in the same flock had died of the same disease.[15] Such lung diseases are a particular danger for sheep kept indoors, and Dolly had to sleep inside for security reasons.