Archive for May, 2010

New DNA Comparison Chart

We’re still waiting for additional testing results, but in the meantime I’ve created a chart to show a simplified version of the matches.

The colored squares show the markers that don’t match. The computer looks at all the samples, and for each marker it figures out what the most common value is. If most of the samples have a 12 in the first spot (which all the Bacharachs do), then that is the most common value or “Modal” value. The “Mode” is listed across the top. Any place where an individual differs from the mode will show up as a color. This is the easiest way to see where participants vary from each other. If one individual has all white squares, he matches the mode 100%. If another has one colored square, he has a genetic difference of one from both the mode and the individual who matches the mode. By looking at where the colored squares are, it’s possible to see how closely the individuals within the group match each other. The chart below shows ONLY the markers where all Bacharach participants don’t match. The additional columns have been stripped away to simplify the chart.

Download the chart as a PDF


1. Kestrich and Hattenbach, which are geographically close to each other, share a value of 34 on CDYa. The others have 33 in that location.

2. Slonim and Rhuzany, in Belarus, match 100%. They are also close to each other geographically.

If we can get more data, there will be more patterns showing the geographical relationships and how the family migrated across Europe.