ABO ADVANCED FORMULAS
CERTIFICATION STUDY GUIDE 2026
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS
◉ The major immunoglobulin class(es) of anti-B in a group A individual
is (are): Answer: IgM
◉ What are the possible ABO phenotypes of the offspring from the
mating of a group A to a group B individual? Answer: O, A, B, AB
◉ The immunodominant sugar responsible for blood group A specificity
is: Answer: N-acetyl-D-galactosamine
◉ What ABH substance(s) would be found in the saliva of a group B
secretor? Answer: H and B
◉ An ABO type on a patient gives the following reactions:
Patient Cells With
Anti-A (4+)
Anti-B (4+)
Anti-A1 (neg)
Patient Serum With
A1 cells (2+)
CERTIFICATION STUDY GUIDE 2026
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS
◉ The major immunoglobulin class(es) of anti-B in a group A individual
is (are): Answer: IgM
◉ What are the possible ABO phenotypes of the offspring from the
mating of a group A to a group B individual? Answer: O, A, B, AB
◉ The immunodominant sugar responsible for blood group A specificity
is: Answer: N-acetyl-D-galactosamine
◉ What ABH substance(s) would be found in the saliva of a group B
secretor? Answer: H and B
◉ An ABO type on a patient gives the following reactions:
Patient Cells With
Anti-A (4+)
Anti-B (4+)
Anti-A1 (neg)
Patient Serum With
A1 cells (2+)
