Blood groups in man / by R.R. Race and Ruth Sanger.

  • R.R. Race
Date:
1954
Catalogue details

Licence: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)

Credit: Blood groups in man / by R.R. Race and Ruth Sanger. Source: Wellcome Collection.

    344/434 page 318
    children belonging to groups not shown could not have arisen from the alleged mating. TABLE ioo ABO Matings showing the possible Children. The Groups ARE GIVEN IN PHENOTYPES AS DEFINED BY ANTI-AL AND ANTI-B Matings Possible children 0x0 O O x A O, A O x B O, B O X AB A, B Ax A O, A Ax B O, A, B, AB Ax AB A, B, AB BxB O, B Bx AB A, B, AB AB X AB A, B, AB The A]A 2 BO groups We have already quoted (page 25) Wiener’s 2 conclusion, after analysing a great amount of family data, that ‘there could be no doubt regarding the accuracy of the theory of Thomsen, Friedenreich and Worsaae in principle, despite the existence of one or two conflicting cases.’ Most workers are some what cautious about the use of the subgroups of A in legal medicine. The Serological Department of the University Institute of Forensic Medicine, Copenhagen, with each certificate of their findings, issue a pamphlet, ‘Guidance in judging of blood-typing results’ (Andresen, 1 1947). Concerning the A X A 2 difference the pamphlet says, ‘In the presence of quite typical reactions for A x and A 2 the possibility of a paternity incompatible with the A 1 -A 2 system has to be considered very remote .’ This is qualified by saying that if a paternity is excluded by one of the parties being A 2 B, and that if the paternity would not have been excluded had the person in question been A X B, then the results should not be considered decisive. The children possible from the different A x A 2 BO matings are shown in Table 101. The MN groups There are difficulties in producing good anti-M and anti-N sera (see page 78), and experience is needed to get the right results con sistently. These tests are, in our opinion, more difficult to do correctly than are Rh genotype tests.
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