Whatever genetic difference, the largest difference I see beyond physical appearance and size, is the ability to fabricate. Meldrum pushes lack of cultural artifacts as putting them in the ape camp as descendants of giganto. But the level of intelligence and even speech that I have observed seems to indicate that he is at least partially wrong. While apes make vocalizations etc no one suggests that they converse with a language. How Meldrum can share the stage with experts in language who say they communicate with speech recorded in the Sierra Sounds and still tag them as apes is beyond me. Someplace and some time they diverged from the human family tree. Their morphology is too similar to have never been in the same family tree. Perhaps a genetic defect in BF caused the lack of the ability to fabricate tools, shelters, clothing etc and set them on a divergent path away from the human family tree. Certainly genetic isolation on this continent over two ice ages would enhance the differences. Another sign of this ability to visualize and fabricate might have been lack of vision in the benefit to migrate across the land bridge in the first place. Who knows! In this period of genetic isolation of the bigfoot line, humans were interbreeding with various branches of their family tree in Eurasia and the best traits of each were likely to survive the two ice ages. Maybe Bigfoot was stuck with what they had when they diverged?