Blood Type Genetics and ABO Alleles

What determines your blood type?

• The type of blood cells

• The enzymes in your stomach

• The antigens on your red blood cells

• The plasma in your blood

What does the IA allele produce?

• No functional enzyme

• Both A and B antigens

• Type A antigens

• Type B antigens

Which enzyme does the IB allele encode?

• An enzyme for type B antigens

• A non-functional enzyme

• An enzyme for both A and B antigens

• An enzyme for type A antigens

Which allele is non-functional and does not produce antigens?

• IA

• IB

• Both IA and IB

• i

How many alleles of the blood type gene does a person's genome typically have?

• Two

• Four

• Three

• One

What is the phenotype of a person who is homozygous IA?

• Type B

• Type A

• Type O

• Type AB

What is the genotype of a person with type AB blood?

• IAIA

• IBIB

• IAIB

• IAi

Which alleles are considered co-dominant?

• IB and i

• i and i

• IA and i

• IA and IB

Which statement is true about the i allele?

• It encodes a functional enzyme

• It is recessive to both IA and IB

• It produces type A and B antigens

• It is dominant over IA and IB

What blood type results from being homozygous for the i allele?

• Type AB

• Type B

• Type O

• Type A