Yeah, the reason Dolly died so young is becuase that she was the age of the sheep the DNA was taken from when she was born. This is becuase the reason that peopel get unhealthy as they get old is their DNA decaying and developing faults. The DNA that Dolly was cloned from had already aged about 4 years, therefore cutting that amount off her lifespan. Technology has improved and scientists have learnt from this though.
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