BLOOD TYPES and CODOMINANT TRAITS

Traits with MULTIPLE ALLELES  (like ABO blood types) are traits that have 3 or more alleles possible at a gene location on your chromosomes.   Alleles “IA” and “IB” are CODOMINANT to the” i” allele.  IA allele causes enzyme activity to create a variant sugar on the surface of red blood cells.  IB causes enzyme activity to create a different variant on the red blood cell surface.  i” lacks the enzyme activity and does not cause any change to the red blood cell surface.

Please complete the following table according to the information in your text on page 244 and from your instructors.

BLOOD PHENOTYPE

ANTIGEN ON RBC SURFACE

BLOOD
GENOTYPE(S)

CAN DONATE TO BLOOD TYPES

CAN RECEIVE BLOOD FROM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A third antigen was discovered to be on RBC surfaces and called the Rh factor, since it was first discovered in Rhesus monkeys.  If you are Rh + you will have a potential antigen that is non-self to people that are Rh and lack the antigen.

BLOOD PHENOTYPE

ANTIGEN ON RBC SURFACE

BLOOD
GENOTYPE(S)

CAN DONATE TO BLOOD TYPES

CAN RECEIVE BLOOD FROM

 

 

 

 

 

 

 

 

 

 

 

 

Your ABO & Rh BLOOD TYPE

Your BLOOD GENOTYPE

Your SPOUSE’S
BLOOD TYPE

Your SPOUSE’S
GENOTYPE

ABO PUNNETT SQUARE

 

EXPECTED PHENOTYPIC RATIO

Rh PUNNET SQUARE

 

EXPECTED PHENOTYPIC RATIO

PEDIGREE OF THE RESULTS OF YOU HAVING 4 CHILDREN (coin tosses)