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BMJ 1999; 318 doi: https://doi.org/10.1136/bmj.318.7197.1506 (Published 05 June 1999) Cite this as: BMJ 1999;318:1506

Mutton dressed as lamb: Dolly, the world's first cloned sheep, is showing signs of premature ageing in her chromosomes. New research at the Roslin Institute in Midlothian, Scotland, where she was born, found that the telomeres, which lie at the end of her chromosomes, are beginning to erode. This type of change is typical of older …

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