Siblingship Test
A siblingship test is performed to determine if two children are half siblings (share one parent), full siblings (share both parents), or are unrelated. Often, a siblingship test is performed to indirectly determine paternity when the alleged father is unavailable for testing. This test is also useful for reuniting adoptees or siblings who were separated from their biological families at birth.
There are two types of siblingship tests:
A half siblingship test is performed to determine if two children from different mothers have the same biological father.
A full siblingship test is performed to determine if two children of the same mother have the same biological father.
Because siblings inherit their DNA from the same biological parent(s), siblings would have more DNA in common than unrelated individuals. In a DNA siblingship test, 16 genetic markers are used to create DNA profiles for the two siblings. The profiles are compared, and if the siblings have genetic markers in common, the statistical significance of these common markers is calculated, producing a probability of half siblingship or full siblingship. Participation of the mother(s) is helpful in this analysis to help account for the part of the child(ren)’s DNA that was not inherited from the alleged father. Motherless siblingship tests are more costly and take longer to complete.
To request more information or to start your DNA test, please call 1-800-281-2928 or use our online request form. We will review the information you provide and guide you through best DNA testing process for your particular situation.
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