To make an old Nintendo light gun work with a Sega Genesis...

I have not seen any adapters that allow original NES controllers to be hooked up to Sega Genesis controller ports and this serves a problem as I am considering purchasing one of the Sega Genesis/NES combo systems. I don't think it would work, but what if I took the controller plug from a Sega Genesis controller, lopped it off, lopped the controller plug off the NES controller and took the data and power wires and soldered them together? I am pretty terrible at electronics stuff as I have pretty much no knowledge about it outside of how to solder things. I might remember about resistors and such when I start doing electronics projects again but as of right now I don't.