Board Thread:Theories and Speculation/@comment-5012682-20150620162706/@comment-25576506-20150622141251

I think its genetic to an extent. Like yin release, which can be gained by the use of genjutsu with the sharingan which is passed down genetically. I think their adaptability to fire is passed down through genetics hence why Uchihas are notorious for fire release. It wouldn't make sense to train their clan to use fire release if they didn't have some natural talent for it.