BLOOD BANK ASCP EXAM

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BLOOD BANK ASCP EXAM |

QUESTIONS AND CORRECT

ANSWERS | LATEST UPDATE |

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Question : What type of serological testing does the blood

bank technologist perform when determining the blood group of a patient?

CORRECT ANSWER : phenotyping

Question : 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 : 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?

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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.

Question : Which of the following statements is true?

• An individual with the BO genotype is

homozygous for B antigen

• An individual with the BB genotype is

homozygous for B antigen

• An individual with the OO genotype is

heterozygous for O antigen

• An individual with the AB phenotype is

homozygous for A and B antigens

CORRECT ANSWER : B. An individual with the BB

genotype is

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homozygous for B antigen

Question : Which genotype is heterozygous for C?

• DCe/dce

B. DCE/DCE

• Dce/dce
• DCE/dCe

CORRECT ANSWER : A. DCe/dce

Question : Which genotype(s) will give rise to the

Bombay phenotype?

CORRECT ANSWER : The Bombay phenotype will be

expressed only when no H substance is present. The Oh type is expressed by the genotype hh. Bombays produce naturally occurring anti-H, and their serum agglutinates group O red cells in addition to red cells from groups A, B, and AB persons.

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Question : Meiosis in cell division is limited to the ova

and sperm producing four gametes containing what complement of DNA?

CORRECT ANSWER : 1N. Meiosis involves two

nuclear divisions in succession resulting in four gametocytes each containing half the number of chromosomes found in somatic cells or 1N.

Question : A cell that is not actively dividing is said to be

in:

CORRECT ANSWER : Interphase, The cell is engaged

in metabolic activity. Chromosomes are not clearly discerned; however, nucleoli may be visible

Question : Which of the following describes the

expression of most blood group antigens?

CORRECT ANSWER : Codominant

Question : What blood type is not possible for an

offspring of an AO and BO mating?