Family institution is an important factor to form a person's character rather than genetic factors. Due to inculcating from family institution will be able to form and improve a person's character.
Firstly, inculcating in manners is a behavior with respect to the parent and the elders in the family like the person play respect to the parent and the elders whenever seen.
Secondly, inculcating in discipline and responsibility like responsibility for the housework that has been assigned by the family.
Lastly, inculcating in morality like the person do not lie to the parent and the elders in the family.
These example shows that a person's character in manners, responsibility and morality are formed by inculcating from family institution, not the genetic factors.