A test of brotherhood determines whether two children share one or both parents.
The brotherhood test is a DNA test carried out to determine if two children share one or both parents (eg, if they are half-brothers or siblings of father and mother). It is an indirect way of determining family relationships when a presumed father is not available for a paternity test.
The brotherhood test can be done in several ways:
Brother 1 and Brother 2 who do not share the same mother and want to find out if they share the same biological father – in this situation, a half brotherhood test is carried out.
Brother 1 and Brother 2 share the same biological mother but are not sure if they share the same biological father – in this situation, a full brotherhood test is carried out.
In the test, the siblings’ DNA profiles are compared to see how much of their DNA may have come from a common father. The participation of the mother is recommended to help exclude the mother’s contribution to the child’s DNA.
Potential uses for the sibling test
When the father is not available for the paternity test