i was about to get into some biology but nahhhh lol
my guess that if a girls are born they will get the Byakugan and if a boy was born it would get the sharingan or they could just be born with both
one eye would be byakugan and the other sharingan and they would be able to see 180 degrees instead of 360 due to only having one byakugan but when the sharingan eye goes blind from MS it would switch to 360 to compensate for the blindness in one eye lol
it would be the rinningan LMAO
SIG AND AVA BY JAIDEN
If what Kakashi said about the Sharingan descending from the Byakugan then we can assume the child would have a more likely chance to obtain the Byakugan as there is more genetic material there for it.
I've always thought it would be great if someone went Tien on us and got three eyes and used the Rinnegan and Sharingan as his/her two main eyes and the Byakugan as the third eye.
If you are putting it like that then the child would be born with the sharigan because it is the latter one. It wouldn't de-evolve back to the byakugan...
Think of it like this some child of a hyuga was born with the sharingan, most likely he would have gotten married to his cousin because thats how thing work to keep the bloodline strong then an other sharingan com e, if not then the sharingan would not exist........ b ut thats only if the Sharingan come from the Byakugan.
sasuke would marry his cousin for power