Participants in this group can trace their oldest ancestors to the Isle of Islay.

Kits in this group are 43463, 48924, and 126818.

Reading the Genetic Distance Chart

If you look at kit 43463 in the top line and kit 126818 in the left column, the square where they intersect is a greeen 0.

FIRST look for the color in the squares. Green means a definite relationship, Yellow is a probable relationship, and Red is a possible relationship. In this case, there is definitely a relationship between kit 144395 and 148740.

THEN look at the number in the square. This is the numerical difference between two sets of markers and is useful for calculating the number of generations back the two families are likely to have shared a common ancestor. In this case, the genetic distance is 0.

The white boxes reflect the number of markers tested in that particular kit. Look where 48924 across the top intersects with the line from 48924 in the left column–there is white square with “37″ in it.

Modal is basically the average marker values for all the people in this group and is best used for statistical analyses of large groups.

Once you find relationships you are interested in, scroll down below to the Time to Most Recent Common Ancestor Chart

Once you find relationships you are interested in, scroll down below to the Time to Most Recent Common Ancestor Chart

The same principles apply to reading this chart. TMRCA requires an estimate of the number of years between generations. This example uses 30 years.