Hence the Asian professor stereotype.
What's the stereotype? Asians have smaller body parts on average but can be very smart so there is some genetic efficiency at work, of course along with a culture that prizes education. A guess is Asian-Caucasian blends might result in a measurably wider bell curve. There probably isn't much correlation between height and intelligence between Asian and Caucasian, but probably between genetically close people. Between two brothers, the taller one may be slightly more intelligent on average.