When generations of a family are brought to their knees over a kid's biology assignment, it's pretty safe to say that the foundations of the family house of cards were a little bit shaky to begin with. This situation plays out pretty much exactly the same as Ned Stark pouring over the Baratheon lineage and realizing the thing that was right in front of everyone's noses... So, that's why Uncle Carl looks different to Aunt Suzy, who looks way different from Cousin John. It turns out they're the p…