ANTHROP 2AN3 Study Guide - Final Guide: Osteoarthritis, Ebola Virus Disease, Insomnia
4 Apr 2013
School
Department
Course
Professor
Document Summary
Human variation and disease abo blood groups. Blood type genotypic trait because the genetic basis is known. Unlike phenotypic traits, there is no complex interaction between genetic and environmental influences. Type ab: blood types were identified in 1909 by karl landsteiner. A substance (usually foreign to a body) attaches to red blood cells. It is capable of causing the production of antibodies (an antigen is a substance that induces the formation of antibodies because it is recognized by the threat in the immune system) They have no antigens on their blood cells, so the blood cells would not trigger an immune response in another person"s body. B allele- (rarest 16% of the population) Haldance (1949) suggested natural selection, specifically disease selection: most of the evidence though comes from infectious disease, some microbes may have antigens similar in structure to a, b and o antigens. Immune system may not recognize as invading organisms.
