Question

Acording to the information above and the general laws of biology, which of the following statements is inaccurate?

1. Some people with blood Type AB had a parent whose Type was A.
2. Antibodies are proteins formed by the recipient that attack the proteins on the donor's RBCs.
3. People with blood Type A, whose mother is Type B, can donate blood to Type A individuals.
4. People with blood Type AB cannot receive blood from a Type B donor.
5. People with blood Type O cannot receive blood from a person with Type AB.

Answer 1

The four major blood groups in humans are A, B, AB, and O. People who are Type A have a certain protein on their red blood cells (RBCs) that is referred to as “A”. People with Type B blood lack the “A” protein and have “B” instead. People with Type AB have both proteins, while those with type O have neither protein on their RBCs. People with type O blood are called universal donors because they can give blood to individuals of any other blood group, since the recipients will not form antibodies to the O blood, which carries neither protein. Every person receives half of his or her blood group type from the mother and half from the father, so that everyone has two alleles, or gene types, for the ABO blood groups.