Yes general intelligence is related to genes. Two important caveats:
Don’t forget the environment. See the Flynn effect, according to which measures of general intelligence have risen over time, showing the effect of the environment. This is just like height. The Dutch were once amongst the shortest people in Europe, and now they’re amongst the tallest. It’s true that they are tall now, in part, because of their genes, but, since they used to be short, obviously there’s much more to height than just genes. The best genes won’t help an unwatered seed sprout. Someone with low intelligence now might have the genes of a genius, if only they had received an education.
Racists are still wrong. There is an overwhelming consensus that there is no genetic basis for race. There is no gene or set of genes or distribution of genes that all and only members of a race have. In fact, there is more genetic variation within races than between races!
Yes general intelligence is related to genes. Two important caveats:
Don’t forget the environment. See the Flynn effect, according to which measures of general intelligence have risen over time, showing the effect of the environment. This is just like height. The Dutch were once amongst the shortest people in Europe, and now they’re amongst the tallest. It’s true that they are tall now, in part, because of their genes, but, since they used to be short, obviously there’s much more to height than just genes. The best genes won’t help an unwatered seed sprout. Someone with low intelligence now might have the genes of a genius, if only they had received an education.
Racists are still wrong. There is an overwhelming consensus that there is no genetic basis for race. There is no gene or set of genes or distribution of genes that all and only members of a race have. In fact, there is more genetic variation within races than between races!