Kekkei Genkai are abilities passed down genetically within specific clans. It's possible for a ninja to have more than one of these abilities. Kekkei Genkai abilities that work via the user's eye are called doujutsu. Kekkei genkai and their related techniques cannot be taught to or copied by others. However, kekkei genkai can be given to others. Doujutsu, or other kekkei genkai isolated to a single organ, can be transplanted into the body of another, as was done with transferring Obito's Sharingan to Kakashi.
Use of these organs requires much more chakra than someone born with the kekkei genkai. Chakra elements can also be passed down to people outside of the clan, such as Yamato being subjected to DNA re-modification by Orochimaru who wanted to acquire the Wood Release kekkei genkai. However, Yamato's skill in using it is not nearly as powerful as the originator: Hashirama Senju, and the risk of such process was that Yamato was the only one of the sixty test subjects to survive.
List Of Kekkei Genkai In Game:
Eternal Mangekyo Sharingan
Blaze Release (Amatarasu)
Sep 8 2013, 3:07 pm