Using the tools at GEDmatch
to look at Ancestry Composition

a free third party site for DNA test comparisons and more

by Kitty Cooper, blogging at blog.kittycooper.com

To Look at Ancestry Composition at GEDmatch
Note that it is called Admixture there

• All calculators are created by citizen scientists
  
  
• No admixture calculator can be guaranteed
  
  
• The results have a link to the creator's home page
  
  
• Click on Admixture (heritage) to see your choices
  
  
• Which one is best depends on where your ancestors are from

First you have to pick a AdMix Calculator

Start with the MDLP project World-22 calculator to get an overview

Once you choose a calculator you are presented with further options; note that the number at the end of each name is the number of reference populations the result is divided among

Admix Choices

• MDLP – world 22 - General
• Dodecad - General and Africa
• Eurogenes – best for Europeans, has some special extras (jewish, hunter gatherer)
• HarappaWorld – best for South Asia
• Ethiohelix – best for African, use Africa+French with European mixture

• North Europe does best in Eurogenes K12
• K13, the default, is good for most Europeans
• EU K15 is the latest and greatest
• Jtest will show you if you have any jewish ancestry
• The hunter gatherer versus farmer may amuse you

Admix Summary

• The Eurogenes Jtest is only useful if you are not sure if you have any Jewish ancestry
• For European ancestry use a Eurogenes calculator
• For South Asian ancestry use the HarappaWorld calculator
• For African American use the African + French in the Ethiohelix calculator
• All are based on tested populations plus self reported ancestry
• No test is 100% accurate; this is an evolving science

N.B. The actual results pages will always have a list on the left with actual numbers as on that last slide.

Questions on the Admix Tools?

Next Slideshow is the Basics for Using GEDmatch:

https://slides.com/kittycooper/very-basic-approach-to-gedmatch-2023