Rh blood group system

Question 1

In the Fisher-Race nomenclature what does “d” refer to?

Answer 1

Silent allele
Amorph
Absence of D

Question 2

What is the frequency of E antigen in the general population?

Answer 2

30%

Question 3

What does hr’ refer to in the Weiner nomenclature?

Answer 3

little c

Question 4

All of the following are consistent with International Society of Blood Transfusion (ISBT) terminology except:

Answer 4

All genes are written in bold print

Question 5

Where is the Rh antigen located relative to the red cell membrane?

Answer 5

integrally

Question 6

Why is it acceptable for “C Trans” individuals to receive D-positive red cells?

Answer 6

The structure of the D antigen is complete
The Du is a result of steric complications
The Rh antigen on the red cell is normal

Question 7

Why is determination of Rh status crucial for obstetric patients?

Answer 7

All Rh negative mothers are potential candidates for Rh-immune globulin

Question 8

Which IgG subclasses carry the most significance with regard to Rh antibodies?

Answer 8

IgG1

IgG3

Question 9

All of the following may cause a false negative reaction in Rh typing except:

Answer 9

Rouleaux

Question 10

All of the following may occur following an Rh-mediated hemolytic transfusion reaction except:

Answer 10

intravascular hemolysis

Question 11

Which of the following genotypes is consistent with f antigen expression?

Answer 11

Dce/DCE

Question 12

G antigen is present on all of which type of red cells?

Answer 12

C positive

Question 13

If a person has a genotype of LWa LWb, what is his or her phenotype?

Answer 13

LW (a+b+)