Why test the mother in a paternity test?
The DNA paternity test compares 20 genetic markers of the alleged father to those of the child. If the alleged father is in fact the true biological father of the child, then all 20 genetic markers will match. If there are markers which do not match, then the alleged father will be excluded as the child’s paternal father. However, there are cases where a possible mutation may have occurred on one of the loci which may result in an inconclusive result. In such cases, the sample of the mother will assist to conclude the result as it will be able to confirm if the mutation is really a mutation or not.
When can testing the mother be important?
In relationship DNA testing, the mother’s sample is extremely useful. For example, in the case of a full siblings test, the sample of the mother will allow for the elimination of part of the genetic data that has to be compared between the two siblings, thereby, leaving the genetic markers inherited from the biological father for a more straightforward comparison, hence making the result more accurate.
Therefore, if available, we strongly recommend that the sample of the Mother is included when submitting your paternity test.