Punnett Squares

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The page below is a sample from the LabCE course Introduction to the ABO Blood Group System. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Introduction to the ABO Blood Group System (online CE course)
Punnett Squares

All possible genotypic matings for two A individuals:

AA x AA
A
A
A
AA
AA
A
AA
AA


AO x AA
A
O
A
AA
AO
A
AA
AO


AO x AO
A
O
A
AA
AO
O
AO
OO