This question already has an answer here:
I would like to know if bonsai type of a tree is a separate species from its normal version. Do they differ by genes, or is it just a matter of different physical care?
Can I grow a bonsai tree from seed of a normal outdoor tree (of course, I understand that not every species will endure being dwarfed)? Can I grow a normal outdoor tree from some seeds labeled "bonsai"?