Board Thread:Naruto Discussions/@comment-24837927-20140421121126/@comment-1210805-20140422083449

Not contradictory at all. That's how it works for humans. The only way a normal human can form an advanced nature type is through a KKG, whether they are born with it or obtain it through adding someone else's genetic material to their body is irrelevant. A Jinchūriki is a separate matter. We have yet to know the full details on how the sealing of a tailed beast effects its host's body. Going by Naruto, the jinchūriki uses the beast's chakra, meaning no genetic changes are necessary for them to use an advanced nature. Whether the tailed beasts themselves have traits that are classified as KKG is another issue, and one that has no baring on the jinchūriki. The jinchūriki is making use of their chakra, not their DNA.