Admixture Calculator

Tolan K25 R1

**Tolan K25 R1 — Global K=25 Admixture Tool** A modern, high-resolution admixture calculator that breaks genomes into 25 regional components (A–Y). Designed for world-wide samples, it highlights sub-continental signals — from Atlantic and Scandinavian to Siberian, Steppe, Sahara and Amerindian — helping genealogists, researchers and curious users visualize migration, contact zones and recent admixture in an accessible, comparative framework.

25 Components

World Target Region

TOLAN Author

Modern Era

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Chapter I

Calculator Details

Comprehensive information about this admixture calculator

Author TOLAN

Era Modern

Components 25 Populations

Target Region World

Created November 2022

TOLAN

Calculator Creator

About This Calculator

**Tolan K25 R1 — Modern K=25 World Admixture Calculator** Tolan K25 R1 is a high-resolution admixture calculator designed to decompose an individual's genome into 25 geographically and historically informed components. Using modern reference panels that span Europe, Asia, Africa, the Americas and key transitional zones, it estimates proportional ancestry from defined regional clusters such as A–Atlantic, G–Russian-Steppes, N–South-Caucasus, S–Siberian and X–Amerindian. What it analyzes - Genome-wide allele frequency patterns and shared ancestry signals. - Relative contribution of 25 reference populations reflecting modern and recent historical population structure. - Sub-continental resolution that highlights coastal, steppe, mountain and desert-affiliated components. Who it's for - Enthusiasts and amateur genealogists seeking clearer regional breakdowns. - Professional population geneticists and anthropologists comparing samples across modern populations. - Medical researchers who need ancestry-informed population context. Insights you can gain - Proportional ancestry estimates across Europe, Africa, Asia and the Americas. - Evidence of recent admixture events (e.g., Steppe vs. Anatolian, Sahara vs. Equatorial Africa). - Geographic signatures useful for interpreting migration, contact zones and population continuity. Historical and genetic context Tolan K25 R1 reflects modern population structure shaped by Holocene migrations: Neolithic expansions, Bronze Age steppe movements, Silk Road exchanges, trans-Saharan and trans-Atlantic contacts, and recent colonial-era admixture. Each reference cluster is chosen to capture both ancient substrata and recent regional differentiation. Why it’s valuable - Balance of granularity and interpretability: 25 components capture meaningful sub-regional variation without overwhelming noise. - Globally comprehensive references make it suitable for diverse samples. - Useful baseline for comparative studies, ancestry reports, and

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Chapter II

Reference Populations

The populations used as genetic references in this calculator

25 Reference Populations

Reference Panels

A-Atlantic
Populations from the regions around the Atlantic Ocean, including parts of Western Europe and nearby islands.
B-Scandinavia
Populations from Norway, Sweden, Denmark, and Finland.
C-NW-Europe
Populations from the Northwestern part of Europe, typically including the UK, Ireland, and Northern France.
D-South-Alps
Populations located around the Southern Alps, influencing Northern Italy and surrounding areas.
E-West-Med
Populations from Western Mediterranean regions, including parts of Spain, Southern France, and Italy.
F-Baltic
Populations from countries around the Baltic Sea such as Estonia, Latvia, and Lithuania.
G-Russian-Steppes
Populations from the steppes region of Southern Russia.
H-West_Black-Sea
Populations near the western part of the Black Sea, including regions in Bulgaria and Romania.
I-South-East-Europe
Populations from the Balkans and southeastern parts of Europe.
J-South-Med
Populations from Southern Mediterranean regions including parts of Northern Africa and Southern Europe.
K-East-Caspian
Populations located east of the Caspian Sea.
L-South-Caspien
Populations from southern regions near the Caspian Sea.
M-Arabia
Populations from the Arabian Peninsula.
N-South-Caucasus
Populations from the region south of the Caucasus Mountains, including parts of Georgia, Armenia, and Azerbaijan.
O-North-Anatolia
Populations from northern parts of Anatolia in present-day Turkey.
P-Sahara
Populations from the vast desert region of Northern Africa.
Q-Equatorial_Africa
Populations from the equatorial regions of Africa.
R-East-Africa
Populations from the eastern regions of Africa, including Kenya, Ethiopia, and Tanzania.
S-Siberian
Populations from Siberia, the vast region in northern Asia, part of Russia.
T-East-Asian
Populations from eastern parts of Asia, including China, Japan, and Korea.
U-South-Asia
Populations from the Indian subcontinent, including India, Pakistan, Bangladesh, and Nepal.
V-SE-Asia
Populations from Southeast Asia, including countries like Thailand, Vietnam, and the Philippines.
W-Central-Asia
Populations from Central Asian countries, such as Kazakhstan, Uzbekistan, and Turkmenistan.
X-Amerindian
Indigenous populations from the Americas.
Y-North-Russian
Populations from northern regions of Russia.

Chapter III

Understanding Admixture Analysis

Learn how admixture calculators work and how to interpret your results

What is Admixture Analysis?

Admixture analysis is a method used to estimate your genetic ancestry by comparing your DNA to reference populations from around the world. Think of it as creating a recipe of your genetic makeup, where the ingredients are different ancestral populations.

This calculator uses 25 carefully selected modern populations as references, allowing for a detailed breakdown of your genetic heritage.

How It Works

Your DNA is compared to 25 reference populations
Modern populations are used as genetic references
Results show your genetic similarity to these populations
More accurate with a diverse reference panel

Understanding Your Results

Your results will show percentages of genetic similarity to these reference populations. Remember these important points:

Results reflect genetic similarity, not direct ancestry
Modern populations are used as references
Percentages indicate relative genetic contribution
Results are estimates based on available reference data