One person is made up of four grandparents. A human inherits DNA from many ancestors in perpetual years. And the genes of a person are delivered by parents. The gene of parents are delivered by their parents. Therefore ,if you want to know your character, it is sufficient to know the character of your grandparents. I have a compassion mind. It may come from cognate grandmother. I have been heard often by my mother the grandmother was very gentle and wonderful woman. The diligent character might come from paternal grandmother who was very diligent I heard. I have a selfish mind and am stuck with trifles. Probably it come from cognate grandfather who was selfish and prickly person heard by mother. If you want some person, it is sufficient to research the four grandparents of the person.