Parentage Testing for the Determination of Sibship

  • Chantal R. Harrison
  • Sherrie L. Warner
Conference paper
Part of the Advances in Forensic Haemogenetics book series (HAEMOGENETICS, volume 1)


Genetic markers in blood have been used for paternity investigation and methods to quantify the genetic data into a paternity index or a probability of paternity have been described (1,2,3,4,5). We report here a case where the genetic investigation was attempted to determine whether two adults were biological siblings. A method to quantitate the genetic data and calculate a fraternity index using logic similar to that used to calculate a paternity index was devised for this particular situation. We also report a general method to calculate a fraternity index for a biallelic codominant genetic system.


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  1. 1.
    Boyd WC: Tables and normogram for calculating chances of excluding paternity. Am J Hum Gen 6: 426 – 433, 1954.Google Scholar
  2. 2.
    Hummel VK: Biostatistical opinion of parentage based upon the results of blood group tests. Stuttgart, Gustav-Fischer Verlag, 1971.Google Scholar
  3. 3.
    Walker RH: Probability in the analysis of paternity test results in “Paternity Testing,” Washington, American Association of Blood Banks, 1978.Google Scholar
  4. 4.
    Inclusion probabilities in parentage testing. Proceedings of Airlie Conference. Arlington, American Association of Blood Banks, 1983.Google Scholar
  5. 5.
    Probability of inclusion in paternity testing. Arlington, American Association of Blood Banks, 1982.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • Chantal R. Harrison
    • 1
  • Sherrie L. Warner
    • 1
  1. 1.Dept. of PathologyUniv, of TX Health Science CenterSan AntonioUSA

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