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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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