Board Thread:Theories and Speculation/@comment-29769110-20170212133139/@comment-734582-20170218124002

Lorenzo.r.1st wrote: but if the kkg weren't a sure inheritance, than how come every single uchiha, hyuga, and whatever else, always had their clans kkg? Careful breeding. Note that Gaara doesn't have Magnet release despite his father having it. Onoki didn't produce offspring with Dust Release (neither did muu). The Uchiha however breed mostly between Kekkei Genkai users, so the odds of passing them on are pretty high. Besides, since Sarada has it, it's possibly a dominant Kekkei Genkai. (unlike Wood Release, clearly).

I don't believe KKG follow simple genetic models (IE the Aa Bb type stuff in high school biology). It seems they have a structural and a controller genetic component. (IE, there's some DNA that says how to make an eye, so structural. There's some DNA that says to actually make an eye, that is controller). So someone can carry a Kekkei Genkai without it being turned on as he lacks that gene. IE humans carry the genes to have a tail, but they're turned off.

Lorenzo.r.1st wrote: imo, that would mean that hashi developed that kkg, and wasn't necessarily born with it, which would make more sense. watcha think? There's no such thing. Naruto had Wind Release, but Kakashi taught him how to use it. Similar statements about Rasa and Onoki simply talk about the same thing. Note that someone like Toroi uses Magnet Release very differently from the Third Kazekage and Rasa (the latter two imitate Shukaku's sand control).

Since powers like the Rinnegan were lost after just two generations, i think it's clear that it's a recessive KKG. One that has been fragmented over a thousand years (so, 80 or so generations, assuming a 15-year interval). Sure it's possible that the right people reproduce and just so happen to re-accumulate that shattered chakra, but the odds are extremely low, and with the Uchiha and Senju clans destroyed, likely nigh-zero.