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HARR BB EXAM ALL WITH QUESTIONS AND ANSWERS
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HARR BB EXAM ALL WITH QUESTIONS ANDANSWERS
Correct Answer: B - ANSWER What type of serological testing does
the blood bank technologist perform when determining the blood
group of a patient?
A. Genotyping
B. Phenotyping
C. Both genotyping and phenotyping
D. Polymerase chain reaction
Correct Answer: A - ANSWER If anti-K reacts 3+ with a donor cell
with a genotype KK and 2+ with a Kk cell, the antibody is
demonstrating:
A. Dosage
B. Linkage disequilibrium
C. Homozygosity
D. Heterozygosity
Correct Answer: C - ANSWER 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?
A. Gender
B. Race
C. Gender and race
D. Medication
,Correct Answer: B - ANSWER Which of the following statements is
true?
A. An individual with the BO genotype is homozygous for B antigen
B. An individual with the BB genotype is homozygous for B antigen
C. An individual with the OO genotype is heterozygous for O antigen
D. An individual with the AB phenotype is homozygous for A and B
antigens
Correct Answer: A - ANSWER Which genotype is heterozygous for
C?
A. DCe/dce
B. DCE/DCE
C. Dce/dce
D. DCE/dCe
Correct Answer: D - ANSWER Which genotype(s) will give rise to
the Bombay phenotype?
A. HH only
B. HH and Hh
C. Hh and hh
D. hh only
Correct Answer: A - ANSWER Meiosis in cell division is limited to
the ova and sperm producing four gametes containing what
complement of DNA?
A. 1N
B. 2N
C. 3N
,D. 4N
Correct Answer: A - ANSWER A cell that is not actively dividing is
said to be in:
A. Interphase
B. Prophase
C. Anaphase
D. Telophase
Correct Answer: C - ANSWER Which of the following describes the
expression of most blood group antigens?
A. Dominant
B. Recessive
C. Codominant
D. Corecessive
Correct Answer: D - ANSWER What blood type is not possible for an
offspring of an AO and BO mating?
A. AB
B. A or B
C. O
D. All are possible
Correct Answer: D - ANSWER The alleged father of a child in a
disputed case of paternity is blood group AB. The mother is group O
and the child is group O. What type of exclusion is this?
A. Direct/primary/first order
B. Probability
C. Random
, D. Indirect/secondary/second order
Correct Answer: B - ANSWER If the frequency of gene Y is 0.4 and
the frequency of gene Z is 0.5, one would expect that they should
occur together 0.2 (20%) of the time. In actuality, they are found
together 32% of the time. This is an example of:
A. Crossing over
B. Linkage disequilibrium
C. Polymorphism
D. Chimerism
Correct Answer: B - ANSWER In the Hardy-Weinberg formula, p2
represents:
A. The heterozygous population of one allele
B. The homozygous population of one allele
C. The recessive allele
D. The dominant allele
Correct Answer: C - ANSWER In this type of inheritance, the father
carries the trait on his X chromosome. He has no sons with the trait
because he passed his Y chromosome to his sons; however, all his
daughters will express the trait.
A. Autosomal dominant
B. Autosomal recessive
C. X-linked dominant
D. X-linked recessive
Correct Answer: A - ANSWER Why do IgM antibodies, such as those
formed against the ABO antigens, have the ability to directly
agglutinate red blood cells (RBCs) and cause visible agglutination?
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