Wiki Welcome Page

Welcome to the ISOGG Wiki a free genetic genealogy encyclopedia with 287 articles and growing

Autosomal DNA Mitochondrial DNA Y-DNA

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Welcome to the ISOGG Wiki

What is ISOGG?

The International Society of Genetic Genealogy (ISOGG) was founded in 2005 by DNA project administrators who shared a common vision: promotion of and education about genetic genealogy. Our mission is to advocate for and educate about the use of genetics as a tool for genealogical research, and promote a supportive network for genetic genealogists.

This Wiki was established for the benefit and education of the genetic genealogy community. To contribute to this Wiki please join ISOGG (it's free!). If you don't have information to contribute enjoy reading the articles on this website.

Explore the ISOGG Wiki

DNA projects

23andMe projects Family Finder projects Genealogical society projects Geographical DNA projects

MtDNA haplogroup projects Native American projects New DNA projects Null value

Special DNA projects Surname DNA projects Walk Through the Y Y-DNA haplogroup projects

DNA tests

Admixture analyses Autosomal DNA Deep clade tests

Free DNA tests Mitochondrial DNA tests Specialist DNA tests

Walk Through the Y X chromosome testing Y chromosome DNA tests

Genetic Genealogy Resources

Comparison Charts of DNA Testing Companies

• Autosomal DNA testing comparison chart
• Ethnic origins Y-DNA SNP testing chart
• Ethnic origins autosomal DNA testing chart
• MtDNA testing comparison chart
• Y-DNA testing comparison chart

Historical Timeline of Genetic Genealogy

• History of genetic genealogy
• Statistical summary of DNA projects
• Pioneer surname projects (before 2002)

More Resources

Abbreviations Ancient DNA DNA databases Genetic genealogy blogs Genetic genealogy books Genetic genealogy journals Genetic genealogy mailing lists

Genetic genealogy videos Genetics glossary Genetics courses List of DNA testing companies Regulation of genetic tests Software

Genealogy Resources

• Copyright
• Family history software
• Genealogical societies
• Genealogy blogs
• Genealogy resources by country
• Surname mapping

Things to do

Did you know?

You can find out more about this term...

• Non-paternity event -  Non-paternity event is a term in genetic genealogy and clinical genetics to describe the case where the biological father of a child is someone other than who it is presumed to be. The presumption may be either on the part of the presumed father or by the physician. Non-paternity may result from a number of different scenarios: it may arise from sperm donation or when the mother had sexual intercourse with a man other than the presumed father. Other than the situation of egg donation, the identity of a child's mother is seldom in doubt.

Non-paternity (and non-maternity) may also ..→

Tips for Searching the Wiki

The easiest way to find pages is to type the subject of interest into the Search Box on the top-right of your screen. As you type, a drop-down list of pages will appear. Click on a suggested page to view it or click the very bottom of the list where it says "containing" to view every mention of the search term in the ISOGG Wiki. Abbreviations can also be used as navigation shortcuts so that, for example, if you type in SNP you will automatically be redirected to the page for single-nucleotide polymorphism, NPE will take you to the page for non-paternity event and atDNA will take you to the page for autosomal DNA.

The Contents Page provides a thematic list of all the pages in the ISOGG Wiki. Additionally the Wiki can be searched from the Index, an alphabetical listing of all articles in the Wiki. Alternatively you can browse the pages by searching the Category Tree.

Wiki Documentation and Help

Editing guidelines - an introduction to the basic features of the ISOGG Wiki Style guide - preferred spellings and usage Help Contents Page - help pages on reading, navigating and editing the ISOGG Wiki

Sandbox - test your edits and play around in our Sandbox Visit the Help Portal for further resources

Things you can do to help

Get involved

• Join ISOGG - You need to be a member of ISOGG and have a registered Wiki account before you can edit this Wiki.
• Register and login - Once you have joined ISOGG you will need to apply for an ISOGG Wiki account. Your name and email are checked against the member database, and you will then be granted an account.
• Learn how to edit

• Ask an editor or admin for help

• Upload images

If you would like to contribute to the Wiki and you are not able to join us, please send your corrections, comments and articles to the Wiki Admins.

Help us improve

• Suggest ideas for future articles or improvement to existing content. Post your thoughts on our Roadmap
• Add or edit pages in the Portals.
• Work on one of the Wiki pages that are in need of additional content.

Wiki Projects

Portal Project

• The Portal Project is the start of a major reorganization of the Wiki content into thematic portals to aid in Wiki navigation and searching. Some of the new and proposed portals are listed below:

• Autosomal DNA Portal
• Mitochondrial DNA Portal
• Y-DNA Portal
• DNA Projects Portal
• Genetic Genealogy Resources Portal - Blogs, books, courses, journals, videos, presentations and much more
• DNA Project Administration Portal - references and resources for DNA project administrators.
• Genealogy Portal