Conversion page

General note
In the past, variant names were used for some markers prior to them being assigned standard nomenclature. The column on the right of the table below
shows the correct names to use:

*The primers used to locate these markers are slightly different, yet the region amplified and analysed are identical. Therefore DYS19 is directly equivalent to DYS394. DYS19 is most in use by the forensic community and hence is used by Ybase.

Haplotype entry and searches can only be performed on the correct, standard scientific nomenclature that Ybase uses.

In the recent past, some laboratories have reported non-standard results which require conversion prior to entering into Ybase. If your testing company is listed below, you can follow the instructions on how to make the conversion.

DNA Heritage via www.dnaheritage.com
All marker changes made by DNA Heritage are noted in the one reference file

Family Tree DNA via www.familytreedna.com
GATA H4/GATA H4.1
FTDNA customers need to add 11 to bring their GATA H4 values in line with GATA H4.1

DYS464a-d
As of the 19th May 2003, Family Tree DNA are now reporting the DYS464 markers (which includes DYS464a, DYS464b, DYS464c, and DYS464d) in line with standard scientific nomenclature. All values have been reduced by 1. Thus a value of 15 now becomes 14.

All records from FTDNA customers entered into Ybase before this date were automatically corrected to reflect this change.

Customers who receive results after this date are unaffected.


Family Tree DNA customers will also need to make the following adjustments:
DYS441 +1
DYS442 +5
GATA A10 +2

- - - -
Prior to March 2002, results from Family Tree DNA were given as proprietary 'scores'.
Since March 2002, results have followed standard scientific nomenclature and conversion factors have been given for the 'scores'.
Open the calculator here
Current customers are not affected.

Oxford Ancestors via www.oxfordancestors.com
The two markers DYS389i and DYS389ii are slightly more complex than other markers. Oxford Ancestors uses old nomenclature for these markers.
Open the calculator here

Relative Genetics/GeneTree/Ancestry.com via www.relativegenetics.com
All marker changes made by Relative Genetics/GeneTree/Ancestry.com are noted in the one reference file


- - - -

For old Relative Genetics/GeneTree/Ancestry.com customers - the letter 'scores' used by this laboratory for the markers 385a, 385b, YCAIIa and YCAIIb have now been given their correct numeric values...