Q.Can Root Stalk And Scion Come From The Same Tree
Can a seedling and scion be grafted from the same tree? Let’s say I get an avocado from my tree and grow the seed. When the seedling is grown (root stock), can I then get a scion from the same tree and graft it on the root stock? Will that tree bear fruit like an avocado tree with a root stock and scion from a different tree?

Certified GKH Gardening Expert
No, it will be the same tree.
Often, the rootstalk is a variety that is hardier than the upper part or scion. Here is more:
https://www.gardeningknowhow.com/garden-how-to/propagation/grafting/rootstock-information.htm