| OCR Text |
Show 24 Utah Academy of Sciences, Arts and Letters method can be' specific absorptive power of ground bone. If the the confirmed or improved upon, it should extend the usefulness of blood groups in anthropology still more. Racial Distribution of M, N, and P Factors Since the original discovery of the blood groups by Land steiner," other hereditary factors have been shown to be present in the blood of humans irrespective of the blood groups. The M and N factors are two of these;" and no person has been found who lacks both M and N factors. The racial distribution of these factors, M, N, and P, the Rh and Hr in the blood, and also "se cretors" in the saliva, have been studied within the last decade ... ... Only a few studies of racial distribution of M and N factors have been made. The first of these studies was made by Land steiner and Levine." They found significant differences between Whites (with a distribution of approximately 30% M, and 20% N and 50% MN), and Indians in which M was 60%, N 4.88% and MN 35.12%. These findings were verified by Levine, Matson 50 2 % were found and Schrader" among the Blackfeet where only to belong to type N; whereas among Whites in Montana 25% Wiener's'" recent study among Mexican Indians were type N. reveals similar distribution of the M and N factor, as do other Indians and Eskimos having similar distribution of the M and N it is possible for tribes of types. The question may arise as to how American Indians with such Widely different distribution of the blood groups to resemble one another so closely with respect to the M and N types. It must be remembered, however, that the blood groups are determined by a series of three allelic genes while the MN types are determined by one pair of allelic genes. In the case of the blood groups, therefore, there is greater leeway ... for variation. 30 In the "land down under," among Australian aborqines'" and the Ainu, the distribution of the M and N is reversed so that whereas among Eskimos and American Indians there is much 30 and Ainu" M and little N, among the Australian aborqines'" 54 53 and Hin there is little M and much N. The Bedouin 50 All other are low in N. dus.?" like the Eskimos'" and Indians." to have a similar and examined been have that appear peoples more equitable distribution of the M and N types. Because of the difficulty of obtaining suitable antisera for been determining the P factor in blood, only a few studies have carried out on this property. In general, it may be stated that 58 59 and Indians'" that have it has been found that among Whites'" about in occurs 73% and 79% respec been studied, the P factor whereas approximately 98% of Neqroes'" possess it. In ... tively, |
