Well, the first things that come to mind reading that Haiku are cloning and plastic surgery. Neither of those are genres of fiction novels, but cloning can be seen in Science Fiction, so...
What is Science Fiction? /jeapardy
I'm probably really far off right now.
There you go. The category's gothic horror but that's the gist of it.
If you think about classic horror the tropes all revolve around a transformation revealing one of the darker sides of human nature.
Vampire stories are about when we lose control of our lust.
Werewolf stories are about when we lose control of our anger.
Zombie stories are about when we lose control of any number of things, gluttony being one, rational thinking is another.
Jekyll and Hyde, you know the drill.