Board Thread:Theories and Rumors/@comment-24988834-20150711024252/@comment-26509603-20150712161426

Ninja72 wrote: but doctor julien is the crator of zane but he isnt his biological father so that is impossible

Not necessarily. You could say, a nindroid having feelings and a heart is impossible. But in Ninjago, it is not. Doctor Julien felt a father-son bond with Zane, and that could easily be what passes down elemental power: parental love.