Binding of brothers and sisters.
There are two types of Siblingship tests: full Siblingship and half Siblingship. A Siblingship test provides the likelihood of genetic relationship between two possible siblings, specifically when no other relatives are available for study. Please note that a grandparentage or reconstruction test is more definitive than a Siblingship test, especially if the mother is not involved.
Full Siblingship with a Common Parent Participating
A full Siblingship test can be performed if the two individuals
(Sibling 1, Sibling 2) know they share the same mother, but
want to know if they share the same father (who is
unavailable for testing).
Full Siblingship without a Common Parent Participating
We can perform a full Siblingship test even if the mother is not available for testing. The mother's participation is always encouraged for more conclusive results.
A half Siblingship test is performed if the two individuals
(Sibling 1, Sibling 2) know they have different mothers but want to
know if they share the same father (who is unavailable for testing).
Half Siblingship without Parents Participating
We can perform a half Siblingship test even if one or both mothers are not available for testing. A mother's participation is always encouraged for more conclusive results.
o In general, biological relationship testing (such as genetic reconstruction and Siblingship testing) is not
as definitive as DNA parentage testing. It is not possible to determine with absolute certainty whether
two people are siblings or biologically related in some way other than the parent-child relationship. We
can only test whether they are more or less likely to be related.
o Including any biological parents will increase the probability of obtaining conclusive results.