Working with Multiple Alleles


Human Blood Types


Blood Type Antigen(s) Genotypes Can Give to: Can Receive From  
A A AA, AO A, or AB A and O  
B B BB, BO B, or AB B and O  
AB A and B AB AB A, B, AB, and O  (Universal Receiver)  
O none OO A, B, AB, and O (Universal Donor) O