ANTH 1001 Lecture Notes - Lecture 1: Smallpox, Principle Of Faunal Succession, Dentil
Document Summary
O is recessive : no antigens to cause a reaction in the blood of others. B: b antigens- cannot be given to another person with a different blood type: anti-a antibodies. O blood: less susceptible to malaria/yellow fever: formed from a mutation from an a ancestor sometime before humans left africa (old) O is dominant in south america and north america: due to the founder effect. Even if a and b were present in asia, by the time they spread over the new world, there was only o blood type left. B is low in the americas and australia. O has less factor 8 (blood clotting mechanism) Bush sent crib-size mosquito nets to tanzania to protect kids from malaria but babies sleep with their mothers and therefore the nets were useless and did not protect anyone. Maternal fetal incompatibility: fetal blood and mothers blood are different that causes a reaction.
