The first blood type in history, according to one hypothesis, was the AB blood group. This theory suggests that through genetic mutations over time, the AB blood group gradually evolved into the A and B groups, and ultimately, into the O blood group.
Blood Group Evolution Hypothesis
This hypothesis contrasts with the idea that A and B blood groups are the oldest and most dominant. Instead, it proposes a different evolutionary path.
Key Points of the AB Origin Hypothesis:
- AB as the Ancestor: The AB blood type is proposed to have been the original form.
- Genetic Mutations: Over time, genetic mutations led to the development of A and B blood groups from the initial AB type.
- Evolution to O: Further mutations eventually gave rise to the O blood group.
How the Hypothesis Works
The theory is based on the idea that the ABO blood group system did not originate in the order commonly assumed (i.e., O first, then A and B). Rather, the genetic pathway may have been:
- Original AB: The initial blood type was AB.
- Mutation to A and B: Genetic changes resulted in the separate A and B groups.
- Final Development of O: Further mutations resulted in the O group, which lacks both A and B antigens.
| Proposed Blood Type Origin | Description |
|---|---|
| First | AB |
| Subsequent | A and B (resulting from mutations of AB) |
| Final | O (resulting from mutations of A and B ) |
This alternative view of blood type evolution provides a different perspective on the origins of the ABO system. The reference states, "In another hypothesis, the first blood group had been AB blood group, which gradually and over the time due to genetic mutations was resulted in A and B and finally O blood groups."
