Blood Group Genetics and Inheritance

This video tutorial covers the genetics topic of multiple alleles, using human blood groups as an example. It explains the concept of multiple alleles, where a gene has more than two alleles, and discusses the three alleles associated with the immunoglobulin gene. The video highlights the production of antigens A and B, and the recessive nature of allele O. It also covers the co-dominance of alleles A and B, and the potential genotypes for different blood groups. The tutorial includes examples of test crosses to illustrate these genetic principles.

What is the term used to describe a gene that has more than two alleles?

• Triple alleles

• Double alleles

• Single allele

• Multiple alleles

Which gene is associated with the production of different antigens on red blood cells?

• Gene X

• Immunoglobulin gene

• Hemoglobin gene

• Gene Y

What does allele IA lead to the production of?

• Antigen B

• Antigen A

• No antigen

• Both Antigen A and B

Which alleles are co-dominant in the context of blood groups?

• Alleles A and O

• Alleles B and O

• Alleles A and B

• Alleles O and O

What is the genotype for blood group O?

• IAIB

• IOIO

• IAIA

• IBIB

If a person has blood group A, which of the following could be their genotype?

• IBIB or IBIO

• IAIA or IAIO

• IAIB

• IOIO

In a test cross between a blood group O individual and a blood group AB individual, what are the possible blood groups of the offspring?

• Only blood group A

• Only blood group B

• Blood groups A and B

• Blood groups AB and O

What is the phenotype of an individual with the genotype IAIB?

• Blood group O

• Blood group AB

• Blood group B

• Blood group A

In a cross between a heterozygous blood group A mother and a heterozygous blood group B father, what is the expected ratio of blood groups in the offspring?

• 1:2:1

• 1:1:1:1

• 2:1:1

• 3:1

Which blood group is considered recessive to both IA and IB?

• Blood group O

• Blood group AB

• Blood group B

• Blood group A