Biology: Multiple Alleles

What are the 4 possible phenotypes for human blood type?

• Type A

• Type B

• Type BB

• Type AB

• Type O

What 3 alleles are responsible for the phenotypic expression of ABO Blood types?

• I^A

• I^B

• I^D

• i

What determines blood types in humans?

What antigen is present on the surface of Red Blood Cells of a type A person?

What antigen is present on the surface of Red Blood Cells of a type B person?

What antigen is present on the surface of Red Blood Cells of a type AB person?

What antigen is present on the surface of Red Blood Cells of a type O person?

Why can someone with type O blood donate blood to everyone?

• because type O blood does have antigens A and B.

• because it doesn't have A or B antigens that would cause it to be attacked by antibodies.

Why can people with AB Blood accept blood from anyone?

• because they don't have any antigens at all

• because they have already both A and B antigens.

What pattern of non-Mendelian inheritance is shown by ABO blood group?

• Codominance

• Incomplete Dominance

• Multiple Alleles

• X-linked