Board Thread:Boruto Discussions/@comment-32069818-20170521185932/@comment-734582-20170525064137

Darthchew wrote: Just tossing this out there, but could it be that the Uzumaki blood and the Hyuga blood within Boruto awakened his different subset of Byakugan? It could be. Real-life genetics is far more complicated than the simple Aa/Bb type discussed in school. In real life there are genes that carry information for the machinery, genes that can activate or deactivate pieces of genes, genes that can increase or decrease the expression of genes, etc.

It's entirely possible that critical pieces of the Byakugan Kekkei Genkai are in other, remotely-related clans. It's possible the Uzumaki have at least some Hyuga blood, which allowed them to see spirits like the Shinigami and allowed them to bind it.