Board Thread:Versus Debates/@comment-33229263-20171019104931/@comment-33229263-20171019184230

Tasuxeda wrote: Hagoromo was likely missing some of the genes that were responsible for his mothers Rinne-Sharingan it is unlikely the Rinne-Sharingan is the result of a single gene but is more likely to be the result of multiple genes working together to produce the Rinne-Sharingan.

As for requiring Hagoromo chakra to gain the Rinnegan it is possible that both of his children lack some of the genes responsible or at least the genes are split between both brothers. Then why does Hagoromo have both the Sharingan and Rinnegan? It wouldn't make sense. Both come from the Rinne-Sharingan.