Board Thread:Boruto Discussions/@comment-33066801-20170910125949/@comment-25043344-20171006022435

Ice4747 wrote: If naruto is a descendent of hagaromo and Hinata is a descendant of hamura aren't naruto and hinata cousins removed maybe a hundred times or however many generations have passed. In fact if all people who have chakra are just descendants of hagaromo and haruma aren't all people with chakra related? does this mean that any chakra users who become partners are commuting incest, all be it on a very far removed scale that almost definitely wouldn't cause any genetic defects?

Scientifically, birth defects caused by incest are extremely uncommon. It's a myth spread hundreds of years ago so that siblings wouldn't tie the knot. In actuality, the only reason birth defects occur is due to an abnormality in the nervous system of one of the parents.

So, to answer your question, no matter how far/close in blood relation the shinobi actually are, the chances of genetic defects being caused are minimal at best. Meaning that the new Doujutsu Boruto has is NOT a Kekkai Genkai, but rather a product of his chakra's unique nature.