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Determination of ABO blood types based on three SNPs from the ABO gene.
| rs505922 | rs8176746 | rs8176747 | Genotype | Phenotype |
|---|---|---|---|---|
| C/T | T/G | G/C | BO | B |
| C/T | T/T | G/G | BO | B |
| C/T | G/G | C/C | AO | A |
| C/C | T/G | G/C | AB | AB |
| C/C | T/T | G/G | BB | B |
| C/C | G/G | C/C | AA | A |
| T/T | T/G | G/C | OO | O |
| T/T | NA | NA | OO | O |
| T/T | G/G | C/C | OO | O |
| NA | C/C | G/G | NA | NA |
| C/T | NA | NA | NA | NA |
| NA | T/G | G/C | NA | NA |
| C/C | NA | NA | NA | NA |
NA: Allele not known / blood type cannot be determined
