1. ABO Blood Types

2. The most well-known and medically important blood types are in the ABO group. They were discovered in 1900 and 1901 at the University of Vienna by Karl Landsteiner in the process of trying to learn why blood transfusions sometimes cause death and at other times save a patient. In 1930, he belatedly received the Nobel Prize for his discovery of blood types.

3. All humans and many other primates can be typed for the ABO blood group. There are four principal types: A, B, AB, and O. There are two antigens and two antibodies that are mostly responsible for the ABO types.

4. Blood Types Multiple Alleles – more than the usual two alleles for a trait Codominance – Both alleles will be present

5. A = dominant to O B = dominant to O O = recessive AB = codominant

6. Genotypes A = AA, AO B = BB, BO AB = AB O = OO

7. The specific combination of these four components determines an individual's type in most cases.

8. The table below shows the antigens and antibodies with the corresponding ABO type

10. Blood Type & RhHow Many Have ItFrequency ORh Positive1 person in 337.4% ORh Negative1 person in 156.6% ARh Positive1 person in 335.7% ARh Negative1 person in 166.3% BRh Positive1 person in 128.5% BRh Negative1 person in 671.5% ABRh Positive1 person in 293.4% ABRh Negative1 person in 167.6% "THE RAREST BLOOD TYPE IS THE TYPE THAT'S NOT AVAILABLE WHEN YOU NEED IT!"

11. Universal Donor = O Universal Acceptor = AB

12. Mrs. Smith and Mrs. Jones shared a room in the maternity ward. Mrs. Smith is certain the baby she brought home is not hers. Can you help her????

13. Mrs. Smith = AB Mr. Smith = O Baby at Smiths = O Mrs. Jones = A Mr. Jones = A Baby at Jones = A