Distribution and Evolutionary History
The distribution of the blood groups A, B, O and AB varies across the world according to the population. There are also variations in blood type distribution within human subpopulations.
In the UK, the distribution of blood type frequencies through the population still shows some correlation to the distribution of placenames and to the successive invasions and migrations including Vikings, Danes, Saxons, Celts, and Normans who contributed the morphemes to the placenames and the genes to the population.
There are six common alleles in white individuals of the ABO gene that produce one's blood type:
| A | B | O |
|---|---|---|
| A101 (A1) A201 (A2) |
B101 (B1) | O01 (O1) O02 (O1v) O03 (O2) |
Many rare variants of these alleles have been found in human populations around the world.
Read more about this topic: ABO Blood Group System
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