Free ABO Practice Exam 2026: Questions with Answers | Optician Certification Study Guide, Exams of Health sciences

Free ABO Practice Exam 2026: Questions with
Answers | Optician Certification Study Guide,
Exams of Health sciences
Which of the following shows ABO frequencies from most common to least
common?
a. A > O > AB > B
b. AB > A > B > O
c. B > AB > A > O
d. A > B > AB > O
e. O > A > B > AB
e. O > A > B > AB




What antibody class are ABO antibodies primarily?
a.
IgA
b.
IgE
c.
IgG
d.
IgM
IgM

, Free ABO Practice Exam 2026: Questions with
Answers | Optician Certification Study Guide,
Exams of Health sciences
All of the following (a-d) would be classified as natural occurring antibodies
(produced from “look alike antigens” in the environment and not from foreign red
blood cell exposure) except:


a.


Anti-A


b.


Anti-B


c.


Anti-A,B


d.


Anti-D


e.


All of the above (a-d) would be classified as natural occurring antibodies

, Free ABO Practice Exam 2026: Questions with
Answers | Optician Certification Study Guide,
Exams of Health sciences

Anti-D




Which of the following would be considered Codominant?
a.
AO
b.
AB
c.
A1A2
d.
Dd
AB




Which would be considered a heterozygous expression?
a.
OO
b.
ee
c.
cE

, Free ABO Practice Exam 2026: Questions with
Answers | Optician Certification Study Guide,
Exams of Health sciences
d.
Cc
Cc




Which one of the following is considered recessive?
a.
A1
b.
A2
c.
c
d.
Se
A2




3+ agglutination appears as:
a.
One large solid agglutinate with a clear background
b.
Very fine agglutinates with a red background
c.