Blood Group Systems and Dosage Effect Quiz

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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?

Rh system Signup and view all the answers

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

Suppressor genes Signup and view all the answers

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

Dominant gene 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?

Dosage effect 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?

Linkage 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?

Haplotypes Signup and view all the answers

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

Allogeneic antigens Signup and view all the answers

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

Linkage 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?

Dosage effect Signup and view all the answers

What does the term 'phenotype' refer to?

The observable expression of inherited traits Signup and view all the answers

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

The precursor of antigens A and B Signup and view all the answers

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

Recessive gene always expresses itself Signup and view all the answers

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

GYPB Signup and view all the answers

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

They are opposite antigens encoded at the same locus Signup and view all the answers

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

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