Japanese scientists create 581 copies of the same mouse through 25 rounds of cloning
By improving each step of the procedure, they were able to clone the mice repeatedly without seeing a reduction in the success rate.
The 581 healthy mice obtained in this way were all fertile, gave birth to healthy pups and lived for about two years, similar to mice conceived in the normal way.
The researchers said: ‘Our results show there were no accumulations of epigenetic or genetic abnormalities in the mice, even after repeated cloning.’
Dr Wakayama’s work hit the headlines in 2008 when his team created clones from the bodies of mice that had been frozen for sixteen years, again using SNCT.
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