I know, through combat and physical touch, which my character did with a member of the Uchiha, she was able to gain the genetic coding for it. Not to mention it is unknown who her parents were so there's a chance that she has some Uchiha bloodline heritage which allows her to use this ability so well. Besides all of that the experiments Orochimaru preformed on her were insane, he could've been able to encode that in her genes easily especially since what Orochimaru had done it before with the first hokage of the hidden leaf.
•I'm his broken doll, He's my maestro. I'm her nee-chan.. I'm they're heavenly sin..•
"Misa: I couldn't DREAM of a world without light! Ryuzaki(L): Yes, that would be quite dark."
"Tsukiakari no Michishirube • Quite/Thinking"