I have a hypothesis for a long time about The Difference of Mother and Father In Genetics of Mental Ability. In my hypothesis, the contribution of a father to intelligence is created to his X chromosome. His X chromosome with created intelligence is actually inherited to his daughter, and to his grandson through his daughter.
For improving the genetics of the created intelligence, a well-achieved man should have more children in his later life. However, the practice of human reproduction does really ignored the genetics of the created intelligence. Should human change their behavior of reproduction for improving the genetics of the created intelligence?