Now that i thought about it.

[UncleRuckus]

Calm down bro. You're going about this backwards. You can't simply state this as fact because you think it gels with the manga you are reading.

Rather, anything that is obviously unrealistic in the real world is also unrealistic in the narutoverse until we are told otherwise. So until we learned eye transplants and eye powers reliably existed in the Narutoverse, we had to assume it wasn't part of it. So until Naruto's kids show signs of Hashirama DNA, you cannot assume one way or the other that its part of the universe. Its real simple. No need to be so defensive.

Its a theory backed with evidence...because thats how everything seems to have been working...naruto didnt even need to have been directly given birth to by rikudo to be able to have a hint of his son's dna (chakra/cells what have you). And they're not even remotely related (perhaps distant clan..but thats basically the same thing im talking about with hashirama's cell). Ive used facts to back up my "thought", which was that, i nthe past similar effects have happened such as madara's mutation, obito's mutation, orochimaru's mutation, the reaction of the cells it self. Even the term "ancestory" as far as narutoverse goes backs up the idea of hashirama's cell being carried over to naruto's kids.