Human blood types

ID#: 1B
Period: 7
Date: 8-31-11
LAB11-1: Human Blood Types

Purpose: To determine human blood types and Rh factor, by interpreting antigen/antibody reactions, and to eliminate suspects.

Organism: Homo sapiens – “humans”

Hypotheses:
1. If human blood type A is mixed with anti-A and anti-B antibody serums, then coagulation will occur in anti-A.
2. If human blood type B is mixed with anti-A and anti-B antibody serums, then coagulation will occur in anti-B.
3. If human blood type AB is mixed with anti-A and anti-B antibody serums, then coagulation will occur in anti-A and anti-B.
4. If human blood type O is mixed with anti-A and anti-B antibody serums, then coagulation will not occur.

Data:
Table 1: Antigen/Antibody Reactions of Known Blood Antigens (coagulation YES/NO)
Blood Type Anti-A Anti-B
A Yes No
B No Yes
AB Yes Yes
O No No
Rh Factor Anti-Rh
Rh + Yes
Rh - No

Table 2: Identification of Antigens Present in Blood Samples with Unknown Antigens
Antibody Self Murderer
Anti-A No Yes
Anti-B Yes No
Anti-Rh Yes Yes
Blood Type and Rh Factor B+ A+

Sketches:

Blood Type A Blood Type B Anti-A Anti-B

Anti-A Anti-B

Blood Type AB Blood Type O Anti-A Anti-B

Anti-A Anti-B

Self Murderer Rh Factor

Blood Sample

Anti-A Anti-B
Rh Sample

Anti-Rh Blood Sample

Anti-A Anti-B
Rh Sample

Anti-Rh
Rh + Rh-

Anti-Rh

Key: No coagulation Coagulation

Questions:
1. The blood types that show clumping when anti-A serum was added was the A and AB, because this blood types have the protein “A”, and when the anti-A serum is mixed with the blood, it reacts with the protein “A”, causing coagulation.
2. A person with type B blood could safely donate blood to people with blood types B and AB,