Board Thread:Theories and Speculation/@comment-24824859-20141204001040/@comment-26112212-20141208151944

^I think Toneri not having Byakugan is similar to Boruto not having Byakugan, it can happen if the Byakugan user marries non-byakugan user, or a mutation that's all I can think but it is just theory, not proven.