The genophage thing would happen anyway, not sure about Mordin if you lie to him.
I just want to know what in the hell happens if Mordin or any other key characters died at the end of ME2. I need to see this as well.
Rachni are still in the game as my stupid save says I killed them when I didn't. They just keep running around saying "BUT YOU KILLED THE LAST ONE SHEPARD!!!"