Ive cross bred a lot of plants over the years and any old weirdness can come out.
You have to use a trial and error approach to it and then grow out the result,find the traits that you want and the rebreed these and eventually hope to be able to stabilize your new strain.
The best stuff i ever accidently made is a very small mutant that is basically absolutely covered in crystals on every leaf,stem,the lot.
This plant however only gets up to about 16" tall max and yields very little but it is the best stuff i ever smoked or saw.
I am sure that if i pollinate it it will be drastically different as it is a mutant so i just keep the mother alive and take the odd clones for my own pleasure.
Weirdness is always abound in breeding