Genetics

According to this study, researchers have found that most children tend to be emotionally closer to their maternal grandparents. The likely rationale (albeit sub-conscious):

“A maternal grandmother knows with certainty that her genetic material has passed to her grandchildren through her daughter but a paternal grandfather has double uncertainty — he has no certainty that either his son or his grandchildren bear his genetic material.”

But I ask you, people, in this case, can there really be any doubt?