How DNA Parentage Testing Works?


We are who we are because of genes.  Genes are chemically coded sets of biological information which are found inside every cell.  Genes code information in particular lengths of a natural chemical called deoxyribonucleic acid (DNA).  DNA is tightly coiled into minute structures called chromosomes.  Any form of gene that may occur in a particular location on a chromosome is called an allele.  Generally, individuals inherit two alleles for each gene (one from their mother and one from their father).  It is this pairing that makes everyone unique.  Some scientists call this our genetic blueprint.

Paternity testing uses this blueprint to determine whether someone is the father of a child.  Utilizing a scientific procedure, the laboratory technicians select a special pair of alleles from the child's cell.  The size of each allele is determined.  The same procedure is followed for the father.  Then, the paternal allele of the child is compared with the alleged father's.  If the alleged father's allele matches the paternal allele of the child's, the result indicates that he is the father of the child.  If the alleged father's allele does not match the paternal allele of the child, the results indicate that he cannot be the father of the child, and he is excluded from paternity.

A standard paternity test consists of collecting DNA samples from the mother, child, and the alleged father.  the collection of the mother's samples is not necessary.  However, utilizing the mother's samples help identify in the child the specific genes that came from the mother, thus eliminating them from consideration in a paternity test.

DNA specimens are obtained through a painless, non-evasive procedure using buccal (cotton) swabs to the inside of the mouth (cheeks).  A strict chain of custody documentation is followed for every client identification, specimen collection, and specimen shipment to ensure that the DNA test results are "legal" and admissible by all courts and government agencies.

In addition to the standard paternity test, AzPTS also offers a number of other DNA testing services.  Other tests include maternity test, grandparentage test, twin zygosity (determines if identical of fraternal), siblingship test, family reconstruction, and gencodex (identity testing...personal DNA identity print).

Arizona Paternity Testing Services specializes in legal/court admissible testing.  Results can be utilized for domestic relations issues including child support and custody, adoption and severance issues, immigration issues, forensics, peace of mind and resolving doubt.