Can the DNA test exclude sibling ship with absolute certainty?
A parent and a child match at each gene. The mother and the father, however, may donate different genes to their children. Look at the child #1 and the child #4 pictured in Figure #1. These two children are full siblings and they have the same parents; however, they have no genetic markers in common. This example illustrates that even true full siblings may not share the same genetic markers. The DNA test for siblings, therefore, cannot exclude a sibling relationship with absolute certainty when only putative siblings are available for the DNA study. The DNA test for siblings has the potential to exclude with absolute certainty when a sufficient number of additional known family members (in addition to the potential siblings) are also available for testing. Contact our laboratory for a case specific consultation. What certainty of sibling ship can the DNA test provide? The DNA test for siblings usually shows a number of genetic matches in true biological siblings. In such cases, the DN
