Board Thread:Theories and Speculation/@comment-3001903-20160813043039/@comment-25122992-20160820121316

Probably, it could be the reason of their bodies accepting Hashi's DNA, but there are still some people who got Hashi's cells without having any relation to Senju. Okay, Danzo has a chance to have some Senju relatives since the Shimura clan was quite close to them, but it's nowhere the case for Madara, the pure-blooded Uchiha. And yet the latter successfully assimilated the cells of Hashi, even twice - during his lifetime and then after being reincarnated. However, this case could be explained by his relation to Hashi via Indra/Asura reincarnation cycle.