Environmental factors affect mutation rates a lot and may be the primary cause! All radiation, chemical mutagions, photons, ultraviolet light, age of the phenotype (phenotype degradation) cause mutations.
Blood types: there are over 46 known antigens in humans, most of which are much rarer than ABO and Rh (Rhesus factor). There is also the D antigen, or the socalled D or H blood type (forget the name) that is extremely rare but occurs in Japan.
Blood types: there are over 46 known antigens in humans, most of which are much rarer than ABO and Rh (Rhesus factor). There is also the D antigen, or the socalled D or H blood type (forget the name) that is extremely rare but occurs in Japan.