Why is my DYS389-2 result at Family Tree DNA different from the Genographic Project?
The Y-chromosome STR (short tandem repeat) marker DYS389 has four parts (m, n, p, and q). At Family Tree DNA we have two tests for DYS389. The first test looks at the first part two parts of marker DYS389 (m and n). This is what we, by scientific convention, call DYS389-1. The second test looks at all four parts of DYS389 (m, n, p, and q). This is what we call DYS389-2. There are two ways to display the result of the second test. The first way to display the result is by showing the exact result from the original test. That is the total for the entire DYS389 marker. This is how Family Tree DNA displays the result. The second way is to show the result only for the second section that is tested by subtracting the DYS389-1 score from the original second test score. This is how the Genographic Project displays the result. You can convert between the two by adding together the two DYS389 values from the Genographic Project to get the DYS389-2 value for Family Tree DNA. To convert to Nationa
The Y-chromosome STR Y-chromosome DNA (Y-DNA) marker DYS389 has four parts (m, n, p, and q). At Family Tree DNA we have two tests for DYS389. The first test looks at the first part two parts of marker DYS389 (m and n). This is what we, by scientific convention, call DYS389-1. The second test looks at all four parts of DYS389 (m, n, p, and q). This is what we call DYS389-2. There are two ways to display the result of the second test. The first way to display the result is by showing the exact result from the original test. That is the total for the entire DYS389 marker. This is how Family Tree DNA displays the result. The second way is to show the result only for the second section that is tested by subtracting the DYS389-1 score from the original second test score. This is how the Genographic Project displays the result. You can convert between the two by adding together the two DYS389 values from the Genographic Project to get the DYS389-2 value for Family Tree DNA. To convert to Nati
