G25 Coordinates

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G25 Coordinates

The Global 25 (G25 coordinates) admixture test is a highly advanced and accurate test that is available on the non-commercial market. By obtaining your G25 coordinates, you can gain a highly detailed breakdown of your ancestry. This test is based on a 25-dimensional principal component analysis (PCA) of your raw DNA data, which allows for a comprehensive analysis of your genetic heritage. The G25 coordinates are particularly useful for identifying specific population clusters, as well as for detecting even small amounts of admixture from different regions. Additionally, the G25 coordinates are also useful for modeling your admixture/ancestry using optimization algorithms. This test can also provide insight into your genetic history, and can help you to understand your genetic connections to different populations and regions.

Genomewide and Chromosomal Level

We create a set of scaled and unscaled* G25 coordinates for your entire genome and for each individual chromosome, allowing you to delve deeper into your results.

Creating a set of scaled G25 coordinates for both the genomewide and chromosomal level provides additional insights into your genetic heritage. By analyzing your entire genome, you are able to view your overall genetic makeup and how it compares to other populations. However, by also analyzing the G25 coordinates at a chromosomal level, you are able to gain a more detailed understanding of your genetic heritage. This is because each chromosome contains specific genes and genetic markers that can provide information about specific traits or ancestry.

What are the G25 coordinates?

The G25 coordinates are a 25-dimensional abstraction of your raw DNA data that is obtained through a principal component analysis (PCA). These coordinates allow you to visualize your position on a genetic map in relation to other world populations. Furthermore, the G25 coordinates are also useful for modeling your admixture/ancestry using optimization algorithms. The majority of genetic variation is captured in the first dimension, with the subsequent dimensions capturing less variation. The later dimensions in the set are used to delineate smaller variations within populations. To make the numbers useful for visual representation, the dimensions are normalized by the PCA, so that the X and Y lines on a graph have a similar length.

How can I obtain the G25 Coordinates?

G25 coordinates are included with every ancestry pack purchase. Visit our store to purchase an ancestry pack: https://www.dnagenics.com/store

Once your results are ready, you will find your G25 Coordinates Library in your account in the “G25 coordinates” menu.

What tools can I use with G25 coordinates?

You can use G25 Studio for analyzing your G25 coordinates. You can find G25 Studio in your account on our website.  G25 Studio Main

What is the difference between Scaled and Unscaled G25 coordinates?

The original data from the PCA are called "unscaled" coordinates. We can adjust these numbers to make some parts more important, based on their significance (Eigen value). This process is called scaling and it makes some tasks easier by reducing the impact of less important parts.

However, these less important parts can still be useful for telling different groups apart, like Siberians from Amerindians or different African populations. So, it's important to use the right method for the specific task.