Board Thread:Boruto Discussions/@comment-33066801-20170910125949/@comment-6769189-20170914023132

Thats not quite how these things work.... Black eyes is not a requirement for the Sharingan. Technically no Uchiha has black eyes, black is just the simpler color to use. Close ups of their eyes show this.

Jinchuurikis children are not said to gain the abilities or have genetic changes because of the sealed tailed beast.

Children recieve half their genetic info from their parents. No nore no less. The resulting traits are luck of the draw. Hair and eyes are seperate genes and shouldnt effect the other. If the Byakugan is recessive then it is recessive, nothing will make it show. Having white eyes is their recessive trait. The ability to use the Byakugan(any dojutsu it seems) is not recessive.

Boruto, however, does not have the Byakugan seemingly because of a """Mutation""". Rather than a dominant/recessive trait, his genes created something new.