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what system is used for human blood typing?
ABO system
what is the ABO blood typing system based on?
a two - allele system with a codominant condition
what are the 4 ABO blood types?
A, B, O, AB
What is an antigen?
a cell-surfaced protein used to identify non-self cells
what is an antibody?
protein created by the immune system in response to non-self antigens
what does the positive or negative sign in a blood type represent?
The Rh factor (antigen)