IQ is a terrible example. It can be trained, with some examples of increases of up to 30 points. It regresses to the mean. Correlation between IQ of parents and

IQ is a terrible example. It can be trained, with some examples of increases of up to 30 points. It regresses to the mean. Correlation between IQ of parents and children is lower at birth and increases up until around 18 (Wilson Effect). At younger influences it is strongly influenced by your environment. And not too long ago it was found that all the genes associated with IQ were false positives.