Final answer:
Blood typing is classified as class evidence because it pertains to shared characteristics within a group rather than unique attributes of an individual. A person with blood type AB/Rh- has Rh antibodies due to the absence of the Rh antigen.
Step-by-step explanation:
Blood typing is considered class evidence because it is based on characteristics shared by a group rather than an individual. Blood types are distinguished based on the presence or absence of different antigens found on the surface of red blood cells. For instance, ABO blood types indicate whether an individual has antigens A, B, both (AB), or neither (O) on their erythrocytes, and the Rh factor determines if the Rh antigen is present (+) or absent (-).
A person with blood group AB/Rh-
If a person has blood type AB/Rh-, they will not have A antibodies or B antibodies because their body recognizes both antigens as self; however, they will have Rh antibodies as they lack the Rh antigen. This illustrates the genetic variations that have evolved over time, affecting red blood cell structure and determining how blood types are classified.