Understanding Your Test Results

The DNA Report shows the results from the laboratory that will create evidence for the alleged family relationship. Here you will find a brief outline into understanding this.

The laboratory tests DNA isolated from swabs and other samples (eg, discreet samples) to locate certain chromosomes that are known to vary in length from person to person; over 20 of these are tested; each one is called a “locus”, “loci” for plural. For additional reference versions of a DNA sequence are called “alleles”. These are also the required genetic markers used tested in grandparents DNA testing.

Each & every person has two of each type of chromosomes, one from each parent, each person has two alleles for their locus. These two alleles can be sometimes identical. With the parentage DNA testing, the laboratory identifies the length of the two alleles found at each locus.

The DNA test report you will receive shows numbers (in the first column) that indicate each of the 21 loci involved in the DNA testing process.

The columns marked “allele” within the DNA test column; contain indicators for the two alleles found at each locus or will suggest they are the same size.

Example, a child with two alleles with designated 12.1 and 18, if the mother has alleles 12.1 and 16, then the child inherited the 12.1 allele from the mother. The named child has to have inherited 18 allele from the father. The alleged father must have this allele if he is determined to be the biological father of the child.