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ABO Blood Group
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ABO Blood Group
Represented by three major types of alleles (human chromosome 9q34) displaying codominance (see Table A2).
Table A2. ABO blood group
| Blood Group (Frequency in Caucasoids*) |
Genotype |
Antigens Formed |
Antibodies Formed |
Clumping With |
Blood Type Acceptable for Transfusion |
|---|---|---|---|---|---|
| O (0.45) |
iOiO |
neither |
anti-A |
A,B |
O |
|
|
|
|
anti-B |
AB |
|
| A (0.44) |
iAiA or iAiO |
A |
anti-B |
B,AB |
A,O |
| B (0.08) |
iBiB |
B |
anti-A |
A,AB |
B,O |
|
|
iBiO |
|
|
|
|
| AB (0.03) |
iAiB |
A,B |
neither |
neither |