The elder son of the So6p had the ocular power ,while the younger son had the body of the sage of the sixth path.We already knew overtime the elder son generation form the legendary uchiha clan .We also know from part 1 that the uchiha clan derive come from the Hyลซga clan .Both hyuga clan and the uchiha clan mate amongst their clan member inorder to keep their ocular power bloodline present amongst their clan.
If the uchiha clan have the same dna from the hyuga clan this mean that if a hyugan and uchiha mate,the chance of their offspring to have sharingan or byakugan is high and their offspring bloodline will not be affected because both clan donot mate with other clan member.In order for sasuke to revive his clan ,he will need to mate with a hyuga member because their ocular dna are similar to the elder son bloodline.Sasuke will have to mate with hinata to restore his clan
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