According to studies at hand, around 19% of Brazil is rh negative. How can this be? Is it similar to how things are in Chile where parts are almost zero percent rh negative while others more than 20%? To get an idea of why, we must examine ancestry. Native Americans were 0% rh negative, so this is not where the rh negative frequency would come from. So what are the mtDNA and y-DNA frequencies among Brazilians? So let’s look at the first clue: Y-DNA But mtDNA is completely different showing more native and African haplogroups. Here is one example from one of the studies highlighted below: In the state of Piauí, individuals descending from Amerindian maternal lineages accounted for 52.3%, … Continue reading Why is Brazil so high in rh negative blood?