Medical Genetics Their sons, on average, will be taller than their fathers because their mothers have on average, more tall"genes to give to their sons than their husbands have On average the son will have more tall" genes than his fatherMedical Genetics Their sons, on average, will be taller than their fathers because their mothers have, on average, more "tall" genes to give to their sons than their husbands have. On average, the son will have more "tall" genes than his father