Just to be pedantic:
Dolly was only the first mammal clone, amphibians have been cloned since the early 50s.
The clones inherit a age significantly older than the donor's age because the first cell
inherits the donor age, but the growth period increaces the age of each cell until the
animal stops growing.
This is because cell age is determined by how many divisions each cell and its parent
cells have made and not by time.
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