Functional genomics is the coming man, even for psychology. James Watson's metaphor this week was brilliant. The genes are like 30,000 actors in a play. A play of 30,00 actors would be damn hard to follow, even if all the actors looked different, which they don't. We know the script was written by natural selection and that the same actors can appear in different plays.
Some actors are stars, some are character actors, and some are regional amateurs.
Some can whisper, some shout. Others can float momentarily across across the stage, yet imperceptibly but powerfully alter the plays meaning. Others can miss their cue turning a drama into a comedy. I think this is the kind of thing that is happening during development and speciation. All rights reserved.