Wait, did you actually compare women to cave men or half monkey? Maybe that's why blacks aren't represented well in highly technical or high paying jobs, cause they only came down from the trees recently?</sarcasm>
OK I'll bite: The problem with your 'evolution theory' is that men and women aren't separate species and interbreed, a lot. Half the DNA in each women comes from a man, and half the DNA for a man comes from a woman. If "women DNA" were 'stupider' than "man DNA", then (like lots of genetic traits (e.g. skin colour, height)), you'd see it evening out over the generations. If there was a "dum dum gene" that only lived on the X or Y chromosome, you'd have to explain why it doesn't seem to affect people who don't have XX and XY (some men are XXY, some women are X, etc.)