Some time ago I read that the cloned sheep, Dolly was found to have
been born with an  approximate biological age of nine years. Was this
found to be valid information>?

Hello pelkeyrobyn,

It appears Dolly's biological age was six years, as you can see in the
quote below:

"What if she grew from an embryo to a frisky sheep but her cells were
the biological age of her mother? Sure enough, in the spring of 1999,
Dolly's caretakers confirmed that the three-year-old ewe's cells
seemed to be older than her chronological age. They were, in fact, six
years old: the age of Dolly's mother at the time Dolly was cloned."
(by Alan Hall)
"The Genetic Key to Turning Back the Biological Clock
http://www.businessweek.com/bwdaily/dnflash/may2000/nf00510b.htm

In the same article, you will see though, that researchers have been
able to clone cows using a "slightly different technique. Instead of
using cells in an suspended stage of development, they isolated cells
that were near the end of their life span and inserted the nuclei of
those cells into a cow's egg cells from which the nucleus have been
removed."

You might want to read through the entire business week article
because it goes into more details and is an excellent read.

Here are some additional links for you:

"Following the Herd"
http://www.bbc.co.uk/worldservice/sci_tech/highlights/cows.shtml

"Future Generations Might Curse Us"
http://www.aict.org/Amritajyoti/Nov-Dec%202001/fdd.asp

Please let me know if you need any clarifications regarding this
answer, and I will do my best to further assist you.
Search Strategy:

tisme-ga


Search Strategy:

dolly "biological age"
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Answer was spot on and provided all that I needed to pursue my current
research. Responder was courteous, helpful and willing to go further
if necessary.