IB Biology D3.2.9 ABO blood groups
IB Biology D3.2.9 ABO blood groups

IB Biology syllabusBiology SL/HLFirst assessment 2025
Practise predicting ABO blood groups from parent genotypes, interpreting antigen and antibody tables, and using data on blood group frequencies.
How this is tested
- explain how IA, IB and i produce A, B, AB and O blood groups
- apply crosses to predict possible child blood groups from parent genotypes
- interpret antigen-antibody tables to decide safe or unsafe blood transfusions
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