Board Thread:Theories and Speculation/@comment-5413572-20150114180437/@comment-3568954-20150210161006

Elveonora wrote: Except the lore says otherwise. Merging the chakras of both Asura and Indra incarnates restores Hagoromo's chakra, which by your logic shouldn't be possible because evolution occurs and the incarnates simply by having chakra and genes from their actual parents would make the merged chakra not 100% as Hagoromo's but different. Not to mention the databook says that Kaguya's chakra literary dispersed into Hagoromo and Hamura, so what they have so she did. If Asura and Indra's chakras make up Hagoromo's, Hagoromo and Hamura's chakras make up Kaguya's. Madara with Hagoromo's chakra could still use Sharingan, so logically Kaguya should have Rinnegan and Tenseigan since her children's chakras are but halves of hers.

For other kekkei genkai evolving, not sure about that, since the databook says that the known kekkei genkai are fragments of Kaguya's power and Orochimaru and Kabuto's quest to retrace back to Hagoromo's power by taking people's cells support that. If the current chakra/genes were evolved, retracing wouldn't be possible since the result would be different. i simply call inconsistencies on kishimotos writing. there is absolutely no reason that kaguya would have to have the same dojutsu as them. she was not born with chakra they were. so what was unnatural to her was natural to them. but like i was saying just because the chakra is slightly different doesn't mean merging them would not give you the original chakra as in merging hagoromo and hamura's chakra would still allow you to evolve your chakra into that of kaguya's but still there could be slight variations.

we already know its possible to alter your chakra because physically training expands your chakra size by developing the physical energy that makes up half of a persons chakra so does meditation. thats why everyone has different levels of chakra. that is why the narutoverse has people who have no relations to kaguya who have bijuu level chakra. such as kisame or the raikage who all have bijuu level chakra but are not related to her.