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 (C)</p> Signup and view all the answers

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

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

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

<p>Dominant gene (C)</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 (B)</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 (B)</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 (C)</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 (B)</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 (A)</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 (A)</p> Signup and view all the answers

What does the term 'phenotype' refer to?

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

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

<p>GYPB (C)</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 (A)</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 (D)</p> Signup and view all the answers

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