Blood Group Systems and Dosage Effect Quiz
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Questions and Answers

What term describes a gene that does not express a detectable product?

  • Recessive gene
  • Suppressor gene
  • Dominant gene
  • Amorphic gene (correct)
  • Which of the following blood group systems exhibits an autosomal dominant inheritance pattern?

  • ABO system (correct)
  • MNS system
  • Rh system
  • Kidd system
  • What type of gene must be inherited from both parents to produce a null phenotype?

  • Suppressor gene
  • Amorphic gene (correct)
  • Dominant gene
  • Recessive gene
  • In which blood group system are amorphic genes often referred to as null types?

    <p>Rh system</p> Signup and view all the answers

    Which type of genes suppress the expression of another gene in blood groups?

    <p>Suppressor genes</p> Signup and view all the answers

    What is the term used to describe a gene product expressed over another gene?

    <p>Dominant gene</p> Signup and view all the answers

    What is the term used to describe stronger agglutination when a red cell antigen is expressed from homozygous genes?

    <p>Dosage effect</p> Signup and view all the answers

    Which term describes the phenomenon where two or more genes are on the same chromosome of a homologous pair?

    <p>Linkage</p> Signup and view all the answers

    In blood group systems, what is the term for a set of genes inherited together because of their close proximity on a chromosome?

    <p>Haplotypes</p> Signup and view all the answers

    What term is used to describe antigens that are different from the individual receiving a transfusion?

    <p>Allogeneic antigens</p> Signup and view all the answers

    When two genes are inherited together because they are very close on a chromosome, it is known as:

    <p>Linkage</p> Signup and view all the answers

    In immunohematology, what is the phenomenon where a double dose of a specific red cell antigen is present on the red cells?

    <p>Dosage effect</p> Signup and view all the answers

    What does the term 'phenotype' refer to?

    <p>The observable expression of inherited traits</p> Signup and view all the answers

    In blood group systems, what does antigen H serve as?

    <p>The precursor of antigens A and B</p> Signup and view all the answers

    What is the inheritance pattern in individuals with type O blood?

    <p>Recessive gene always expresses itself</p> Signup and view all the answers

    Which gene encodes for the M and N antigens in the blood group system?

    <p>GYPB</p> Signup and view all the answers

    What does it signify when two antigens are described as 'antithetical pairs'?

    <p>They are opposite antigens encoded at the same locus</p> Signup and view all the answers

    What characterizes a genetic system that expresses two or more alleles at one locus?

    <p>'Polymorphic' genetic system with multiple alleles at one locus</p> Signup and view all the answers

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