1. Mostly because it sounds cool.
2. It makes the most sense.
What is Bio Punk? It's a genre that relies on biotechnology for world building (I'm taking that term looser than some). AKA: Superhero-esque stuff, dealing with genetic alterations, mutations, evolution, DNA hacking, and whatnot.
Problem is, you don't hear Bio Punk often. There's Cyber Punk (fiction based on computer tech world) and there's the currently very popular Steam Punk (fiction based on steam tech), but rarely any mention of Bio Punk though it is an actual term. I can think of a lot of YA books that are basically Bio Punk, not just mine. So I'm thinking we should just start making it an actual thing. Especially since 2013 is like the year of YA Bio Punk.
So next time anyone asks me what genre TRANSPARENT is, I'm gonna say Bio Punk, no matter how many weird looks I get.