As we have learned, the native American tribes we know about in South America seem to be originally all 100% blood type O positive.
It also appears to be quite similar for the tribes of North America, except for the exception that about 80% of the Blackfoot Indians of Montana have blood type A.
Repeatedly the claim has been brough up that Cherokees might have had a high percentage of rh negative blood.
Here is a study from 1962 putting this claim to rest:
The Rh types are set forth in table 5. As all blood samples were positive with anti-Rho (D), gene frequencies could be obtained by counting. The most common phenotypes are Rh1Rhl (DCe/DCe) and Rh1Rh2 (DCe/DcE), and the R1 (DCe) allele is more frequent in both full-blooded and mixed Indians than all other Rh alleles combined. In the absence of both Rho (Dccee) and rh (dccee) phenotypes, it is impossible to differentiate between R0 and r alleles. Of 250, 74.4% were in group 0, 16.0% A, 7.2% B, and 2.4% AB. Among 110 considered full-blooded, 93.6% were group 0.
This strongly indicates that the original Cherokees were also 100% blood types O positive.
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