Changes in blood type of native Americans Before Columbus and the European colonization of the Americas virtually no native had A or B type blood group. More from my siteWhich soundtrack out-grossed the film it accompanied?Do deer play the game of tag?Cats in warfareHow many horses are there in Mongolia?Are bananas berries?Number of bubble gum companies in Turkey 3 comments   Get Livefyre FAQ Sign in + Follow Post comment Link Newest | Oldest factcat 5pts @MargiePlatt yep. http://en.wikipedia.org/wiki/Genetic_history_of_indigenous_peoples_of_the_Americas MargiePlatt 5pts Only O??? MargiePlatt 5pts so only O??