I am here to give my theory of why the elder son dojutsu lead to the foundation of Sharingan and Byakugan at full explanation. Some of you probably read my old theory of this but this is more detailed version.
Enjoy
I believe this dojutsu has been divided into the Sharingan and Byakugan through out the time. Now why do i believe that?
as we all know, the Elder Son descendants became the Uchiha, so that means the Sharingan did derive from the Elder Son dojutsu.
But what about the Byakugan:
Yes i know all of you are gonna say Kakashi has been proven wrong but lets analyze this scan logically:
The only things Kakashi was wrong about are:
-Hyuuga are the oldest bloodline clan in konoha
-Sharingan came from byakugan
However he wasn't wrong about how the Uchiha and Hyuuga are some how related to each other. Their abilities to use Yin powers and dojutsu is a proof that Hyuuga did descend from the Elder Son through this scan:
SO6P was divided into Yin and Yang.
Yin = Dojutsu + Spiritual Energy +Powerful Chakra = Elder Son.
Also the Hyuuga seem to possess immense hatred like the Uchiha do but inferior as the fact Neji was influenced by destiny of the Hyuuga clan the same way the Uchiha are influenced by jealousy as seen through Sasuke.
If we were to take the statements Elder Son descendants come are the uchiha in conjunction with Kakashi statement, the most logical and accurate meaning of the context we can come up with is that Uchiha and Hyuuga are cousins of the same family branch and that the Elder Son dojutsu and bloodline divided into these 2 clans the same way the Uzumaki and Senju related and the same way SO6P bloodline divided into the Elder and Younger Sons.
Thank You...Madara Rules:king: