Blood Bank ASCP EXAM| 452 QUESTIONS| WITH COMPLETE SOLUTIONS
Question 1: What type of serological testing does the blood bank
technologist perform when determining the blood group of a
patient?
CORRECT ANSWER: phenotyping
Question 2: If anti-K reacts 3+ with a donor cell with a genotype
KK and 2+ with a Kk cell, the antibody is demonstrating:
CORRECT ANSWER: Dosage
Question 3: Carla expresses the blood group antigens Fya, Fyb,
and Xga. James shows expressions of none of these antigens.
What factor(s) may account for the absence of these antigens in
James?
CORRECT ANSWER: Gender and Race. The frequency of
Duffy antigens Fya and Fyb varies with race. The Fy(a−b−)
phenotype occurs in almost 70% of African Americans and is
very rare in whites. The Xga antigen is X-linked and, therefore,
expressed more frequently in women (who may inherit the
antigen from either parent) than in men.
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