[GSlob]

Well, I've read that the IQ [or rather Spearman's g] is about 70-80% heritable, but I do not remember reading anything re which side it is mostly inherited from. Hopefully in a few decades it will be found out - which genes, and when, and how.

[ReagansShinyHair]

Here's a link:
http://www.flatrock.org.nz/topics/men/thank_mom_for_brains.htm

I guess you never know when "researchers" will discover that they were mistaken, though.