And actually if transplanted organs always gave genetics plus chakra kakashi should of had no problem using the sharingan. Instead he couldn't de activate it at all and it would constantly drain his chakra if he didn't have it covered.... That sounds like a serious lack of uchiha genetics to medoesn't matter. transplant rinnegan users are NOT listed as yin/yang release. which = no rikudou chakra.
sasuke has yin/yang release
naruto has yin/yang release
madara has yin/yang release
juubijin obito has yin/yang release
dms kakashi has yin/yang release.
the main ingredient to those who possess six path chakra/rikudou. nagato only has yang.