The sibling DNA test certifies whether two people are half-siblings, half-siblings or if there is no biological relationship between them.
Carried out in cases where a direct comparison with the putative parents is not possible, the sibling DNA test can be used as an alternative and can answer the question of paternity/maternity.
This test is more complex than the paternity/maternity test as there is no direct transmission – inheritance of DNA between the two siblings.
In cases where greater accuracy of the result is required, parallel testing of one parent or other children of the parent under test is desirable.
The two individuals suspected of being siblings must provide a sample of genetic material through a simple procedure. The results of the laboratory test are delivered in approximately 7 days from the day the sample is taken.
The analyses include the study of 24 to 44 genetic markers (STRs). In addition, 27 Y chromosome genetic markers can be studied to identify the common paternal lineage, mitochondrial DNA polymorphisms to identify the common maternal lineage, and the analysis of 12 X-STR genetic markers to enhance the accuracy of the result.
The analysis and interpretation of the results is performed by 2 expert experts of the laboratory , who sign the final expert report containing the laboratory results and analytical conclusions.