Not sure if you’ve seen this, but thought I’d share just in case you haven’t. As

Not sure if you’ve seen this, but thought I’d share just in case you haven’t. As with all such modern-day studies that seek to place genetic attribution to “squishy measurables”, it needs plenty of vetting. However, the idea that a plurality of intelligence genes reside on the X chromosome is extremely consistent with the principle of males having a shallower-but-wider IQ bell curve relative to females. (Basically, males roll once on a 3d6 for Intelligence, while females roll twice and average the two.)

From a breeding strategy POV, it suggests that a man’s best bet for selecting for intelligent offspring is to mate with a woman with an intelligent father and an intelligent maternal grandfather.