Exam 6: The Abo Blood Group System

Two drops of serum are added to one drop of A₁ cells, and two drops are added to one drop of B cells; the two tubes are centrifuged. The tubes show reactivity when read macroscopically. This is an example of:

Individuals with group B blood are more common among which populations?

An AB male mates with an AB female. What could be the genotype of the offspring?

What testing is available that will differentiate between a true B and an acquired B?

What is the most important use for anti-B lectin?

What other consideration should be made before beginning a subgroup investigation?

What is the biochemical structure of secreted A, B, and H substances?

A patient who was recently diagnosed with an obstructed bowel became septic from Proteus vulgaris. Prior to surgery, a routine type and screen was performed. Though this person typed as an A two years ago, his forward type is consistent with an AB individual, albeit weaker in strength with anti-B. What is the reason for this discrepancy?

What is the source of anti-H lectin?

Which blood group contains the highest concentration of H antigen?

What would be a possible genotype of an A₂B individual?

What percentage of A₂ individuals produce anti-A₁?

Why can anti-H sometimes be found in an A₁B individual?

Which of the following is not characteristic of antibodies within the ABO system?

What is used to stimulate saliva secretion in secretor studies?

Reverse grouping showed negative reactions with A₁ and B cells. Forward grouping showed positive reactions with A, B, and AB antisera. What blood type is consistent with these results?

Which substance must be formed first before A or B specificity is determined?

What is the cause of polyagglutination in most cases?

Where will the ABO discrepancy occur in cis-AB individuals?

A group O person with warm autoimmune hemolytic anemia may demonstrate weak reactions in the forward grouping due to: