>>13187363A lot of markers for intelligence are carried on the X chromosome. A father only has one which naturally he can't pass on to his son, whereas the mother has two, one of which she gets from her father which he inherited from his mother. If a dumb woman has an intelligent father whose mother was also intelligent you have a good chance of having intelligent sons with this woman. Do you see what I mean? Look at the rest of the family if you're looking to be eugenic before making a split decision.
