Board Thread:Theories and Speculation/@comment-36649908-20180820043133/@comment-27924662-20180926074714

Ryanq214 wrote: Well considering this is an ainme, we can't just apply real world logic/science to it unless they do. The naruto world has never mentioned anything like a mutation in someone's gene's or bloodline.

If genetics worked in naruto like it did in the real world then all of the major clans like the uchiha, hyuga, an so on would be full of deformed mentally challenged people because of all the inbreeding.

Also their DNA would be much weaker than the first generation of the clan, as they have no doubt been watered down since kaguya and hagoromo.

I read that to make a rinnegan you actually need the recombination of Indra and Ashura chakra along with senju and uchiha DNA. So the chakra itself matter, but putting it all back together again would just make the same thing. Just like Senju and Uchiha DNA combined together with Indra and Ashura DNA made the rinnegan--which it originally came from, and not something new. There are no mutation in that world ^nothing actually suggest that clans didn't marry outside the clan like you are claiming. It's very clear that Clans had alliances with each other and in order to strengthen these ties they use to marry members to strengthen Partnership. A good example would be Uzumaki's and Senju. In fact i would argue that Senju had several kinds of jutsu thanks to this gene diversity. Another example would be Haku's mother marrying normal humans to hide her ninja heritage. You get the idea As for clans dying out or going insane we do have few examples of them. do you remember Kaguya clan and their bloodthirstiness? Or Chinoike clan of Ketsuryugan? As for mutation argument you are wrong. If i remember correctly there are few examples like Kimimaro, Hamura Otsutsuki, Hashirama's wood release, And most of the KKG users(the ones revolving around elemental release like Typhoon release, Lava style and so on).