Grafting from immature fruit tree

Hello guys, i’m new here. I’m asking if there is a possibility a scion can be taken from immature fruit plant (lets say another 3 yrs grafted fruit tree), will it be the same as from the matured plant?

Genetically, yes; you’ve just re-cloned the clone(grafted tree) you started with.

That said, this is where ‘misidentification’ issues sometimes creep in… I’ve purchased grafted trees, from reputable (and some not-so-reputable) sources that, once they began bearing… were NOT the labeled variety purchased. If you’re grafting - or worse yet - distributing scionwood to others… the resulting plants could end up not being what was promised or expected.