Genotypes and Phenotypes in ABO Blood Type Inheritance

This video tutorial covers practice problems related to ABO blood types. It begins with an introduction to the topic, followed by a detailed analysis of possible genotypes and phenotypes for individuals with type O, A, and B blood. The video explains how to determine the genotypes of parents based on their child's blood type and explores the potential phenotypes of offspring when both parents have type B blood. The tutorial emphasizes understanding the inheritance patterns of alleles and the implications for blood type determination.

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

• IAIA

• IBIB

• ii

• IAIB

If a girl has type O blood, what is one genotype her parents cannot have?

• IAIB

• IAi

• IBi

• ii

What must be true about the parents of a girl with type O blood?

• At least one must be type B

• At least one must be type A

• Both must be type O

• Both must carry the recessive allele

A boy has type A blood and his mother has type B blood. What is a possible genotype for his father?

• ii

• IBi

• IBIB

• IAIA

If a boy with type A blood has a mother with type B blood, what must be true about his mother's genotype?

• She is heterozygous IAi

• She is heterozygous IBi

• She is homozygous IB

• She is homozygous IA

What are the possible blood types for the father of a boy with type A blood and a mother with type B blood?

• Type A or Type AB

• Type O or Type B

• Type O or Type A

• Type B or Type AB

If both parents have type B blood, what is a possible blood type for their child?

• Type O

• Type A or Type B

• Type AB

• Type A

What is the genotype of a person with type B blood who can have a child with type O blood?

• IBIB

• IBi

• IAIB

• ii

If two type B parents are both heterozygous, what is a possible genotype for their child?

• IAIA

• IAIB

• ii

• IBIB

What is the only blood type that two type B parents cannot have in their offspring?

• Type B

• Type A

• Type AB

• Type O