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[–] 10 points 8 months ago* (1 child)

I googled and multiple sources say O+ is the most common type at around 37-39% of the population. You are right about how the genes work but if the majority have two O alleles, then type O is going to propagate and stay common. It also means a lot of people with type A or B are carriers for the O gene and have children with type O. Your math assumes even distribution of all 3 genes

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