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atDNA

Our forensic spreadsheet containing probable allelic frequencies from 400 populations including over 115,000 people from all over the world. If an autosomal STR profile (such as your CODIS markers) is entered, it calculates the average combined frequencies (random match probability) for each population and displays them graphically with dots on a world map. Used in our DNA Fingerprint family of products.

The current version atDNA 4.0 was introduced in September 2011 and is characterized by the inclusion of data for a population known as Melungeon (n=40), by simplified nomenclature for populations, by an enhanced search feature using 60 world metapopulations such as Native American and South Chinese and by the inclusion of megapopulations, the broadest possible ethnic or ancestral category.  The n number shows how many subjects were tested in a given study or how large the sample was. The sample size ranges from less than 50 to several thousands. 

For coverage and possible bias, check out the description of Megapopulations.

Note that these are statistical calculations. atDNA is a probabilistic predictor of population affinities for an individual and it matches populations, not persons. Like all other such programs, it is not absolute. It gives the chances for a match, not strictly speaking a 100% sure match in terms of yes/no. Consequently, all matches must be carefully evaluated and interpreted. 

The 15 searchable loci are:

D3S1358
vWA
FGA
D8S1179
D21S11
D18S51
D5S818
D13S317
D7S820
D16S539
THO1
TPOX
CSF1PO
D19S433
D2S1338

The last two are more in use in Europe than America.

DNA profiles or fingerprints are sometimes referred to as having 16 loci, the 16th locus being AMEL, a measure of male (X,Y) or female (X,X).