I pretty sure moset DNA /RNA strands don'ty hold age data as far as we know. The actual reason why we gae is a bit of an unknown in itself.
So a 40yo's genes are 40yo, sort of. Like putting a tissue implant from an older person into a younger person. Doesn't get older in that part than they do.
Poor Dolly, a rough life for a sheep.
Cheers
Mick