Windows and OS X on same PC?

I want to develop iphone apps. However I have a PC because I know that's best for gaming. I know that Mac comes with bootcamp, and there are other programs you can download to run the two OSs simultaneously. Is there a way to run them both simultaneously starting from the windows side?

Of course there's a possibility, you need to install OS X on the new virtual machine, there are programs that allow you to create a virtual PC with the necessary os
For example here in this program http://www.joydownload.com/vmware-player.html

Not legally and not reliably. Note that the Mac OS will NOT run in a virtual machine.