Your a high school biology teacher?? would you happen to know much about grade 11 - biology 20 - antigens in the blood? this is a serious question lol:
"How could you determine if a blood sample is compatible to transfuse from one individual to another in an emergency situation, if blood typing serum is not available?"
Kopetza, I believe that if you mixed the donor type with the recipient blood they would coagulate if they were wrong. If they were OK to transfuse the blood would not clot up. I might be wrong tho... You'd better try your best to get an O positive donor... Paul
