Admixture Calculator

Dodecad Africa 9

**Dodecad Africa 9** estimates ancestry proportions for individuals of African descent using nine reference groups — including regional African sources (W, E, S, NW), hunter‑gatherer lineages (Mbuti, Biaka, San), and Eurasian inputs (Europe, SW Asia). It offers a clear, modern view of recent and ancient admixture to aid personal genealogy and population research, with transparency about limitations.

9 Components

World Target Region

Dodecad Author

Modern Era

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Chapter I

Calculator Details

Comprehensive information about this admixture calculator

Author Dodecad

Era Modern

Components 9 Populations

Target Region World

Created November 2022

Dodecad

Calculator Creator

About This Calculator

**Dodecad Africa 9 — Modern African Admixture Calculator** This calculator estimates the proportional ancestry of individuals with African roots by comparing genotype data to nine curated reference populations. It quantifies contributions from continental and deep African lineages alongside Eurasian inputs to reveal the mosaic of recent and ancient gene flow affecting modern Africans. **What it analyzes** - Genome-wide autosomal ancestry proportions across nine reference groups: **Europe, Nw Africa (Northwest Africa), Sw Asia (Southwest Asia), E Africa (East Africa), S Africa (Southern Africa), Mbuti, W Africa (West Africa), Biaka, San**. - Relative shares of hunter‑gatherer lineages (Mbuti, Biaka, San), regional African sources, and non‑African admixture (Europe, NW Africa, SW Asia). **Who it’s for** - Individuals of African ancestry (continental and diaspora) seeking fine-grained regional breakdowns. - Geneticists, anthropologists, and genealogists exploring population structure, migration, and admixture in modern African contexts. **Insights you can gain** - Proportional ancestry estimates that illuminate recent historical events (trans-Saharan and Indian Ocean contacts, Eurasian backflow) and deeper prehistory (hunter‑gatherer persistence and Bantu-associated spread). - Distinction between Western, Eastern, Southern and Northwest African signals and identification of Eurasian components. **Historical and genetic context** Africa carries deep genetic structure shaped by ancient hunter‑gatherers (San, Mbuti, Biaka), migrations such as the Bantu expansion, and later Eurasian contacts. This calculator provides context by partitioning these influences into interpretable components. **Why it’s valuable** - Offers a balanced, accessible synthesis of complex ancestry into nine meaningful components for modern users. - Useful for personal ancestry exploration and population-level studies. **Caveats** Reference panels simplify continuous variation; results are esti

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Chapter II

Reference Populations

The populations used as genetic references in this calculator

9 Reference Populations

Europe: Represents the genetic component associated with populations from Europe, including various European countries and regions.
Nw Africa (Northwest Africa): Corresponds to genetic contributions from Northwest Africa, encompassing countries like Morocco, Algeria, and Tunisia.
Sw Asia (Southwest Asia): Represents ancestral contributions from the southwestern part of Asia, which includes regions like the Middle East.
E Africa (East Africa): Denotes genetic affiliations with East African populations, such as those found in countries like Ethiopia, Kenya, and Tanzania.
S Africa (Southern Africa): Represents the genetic component associated with Southern African populations, including countries like South Africa, Namibia, and Zimbabwe.
Mbuti: Indigenous hunter-gatherer populations from the rainforests of Central Africa, signifying genetic similarities with them.
W Africa (West Africa): Corresponds to genetic contributions from West African populations, including countries like Nigeria, Ghana, and Senegal.
Biaka: Another indigenous hunter-gatherer group from Central Africa, indicating genetic affinities with them.
San: Indigenous hunter-gatherer populations from Southern Africa, also known as Bushmen or Basarwa, signifying genetic similarities with them.

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 9 carefully selected modern populations as references, allowing for a detailed breakdown of your genetic heritage.

How It Works

Your DNA is compared to 9 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