What's hidden in your chromosomes?

DNA & Genealogy

Introduction to Using DNA for Genealogy

Buzzes of excitement have become apparent in family history societies over the last few years, as more and more genealogists are starting to use DNA testing as a part of their family history research. 

Due to technological advances and affordable prices, DNA testing is now becoming widely used to confirm family lines and connect with biological relatives.

 

Goals & Benefits

You may want to discover branches of your tree not found through regular research, confirm or disprove family relationships, find cousins with whom to share research & photos, see if persons who share your surname are related, discover your ancient origins, potentially solve long-standing research ‘dead-ends’, or you may simply be curious to see what your DNA reveals.

 

Requirements

Don’t let the scientific nature of DNA scare you off, as once the basic test types are understood, the minimum technical know-how required is the use of email in order to contact your DNA matches.

Collaborate with your new-found genetic relatives using your traditional genealogical skills to determine your ancestors-in-common.

For those who want to delve deeper, there are many free tools and learning resources.

 

The DNA Test Kit

FTDNA DNA Test KitA DNA kit is ordered online from one of three major DNA testing companies located in the US.

Your test kit arrives by mail or courier within a few days to a few weeks, depending on company.

 

Saliva collection tube used by 23andMeThe DNA tests themselves are very simple to use:

After testing, you simply post your sample back to the US in the pre-addressed envelope or package.

All notifications are via email and results are provided via an online account.

 

Ongoing Matches

Once your DNA has been tested, your results are added to a very large database and you access them via your online account (nothing is sent by mail).

Even if you have no close matches initially, large numbers of people are testing each week (including from Australia, NZ, UK & Ireland), and you will continue to receive new people matches regularly.

Your online account is also used to keep track of your order status, to enter your family tree and ancestral surname information, to join projects, to see your results and which people you match, to manage your profile and tree settings, and to download a copy of your DNA raw data file (for use with additional tools/sites).

 

DNA Test Types

There are several different types of DNA that can be tested for genealogical purposes:

 

Pedigree showing types of DNA tests for genealogy

 

  • Y-chromosome DNA (Y-DNA):  Y-DNA tests: the Direct Paternal LineMales inherit a y-chromosome from their father, through his father, his father, his father, etc, on the direct paternal line, as per the blue boxes on the chart above.  Refer to Y-DNA: the Direct Paternal Line for more detailed information, pedigree charts and examples of how Y-DNA testing can be useful in your family history research.
  • Mitochondrial DNA (mtDNA):  mtDNA tests: the Direct Maternal LineEveryone inherits mitochondrial DNA from their mother, through her mother, her mother, her mother, etc. on the direct maternal line, as per the pink boxes on the chart above.  Refer to mtDNA: the Direct Maternal Line for more detailed information, pedigree charts and examples of how mtDNA testing can be useful in your family history research.
  • Autosomal DNA (atDNA):  atDNA tests: All Ancestral LinesAutosomal DNA is inherited from all ancestral lines, so anyone can be tested and your matches may descend from anyone on your pedigree chart, up to about 6 generations back (but may be further).  Refer to atDNA: Finding Matches on All Ancestral Lines for more detailed information, pedigree charts and examples of how atDNA testing can be useful in your family history research.
  • X-chromosome DNA (X-DNA):  X-DNA: defined inheritance patternsX-chromosomes follow specific inheritance patterns, which are different for males and females.  If you share X-DNA with a match, your shared ancestors will be restricted to particular lines of your pedigree.  Refer to X-DNA's helpful inheritance patterns for more detailed information & pedigree charts related to X-DNA inheritance.

For more details refer to What type of DNA tests are available?

 

Ethnic & Ancient Origins

FTDNA myOrigins map

Autosomal DNA tests include an estimate of your ethnic ancestry, including cluster maps and population migration maps showing where your ancestors came from hundreds or up to a few thousand years ago (sample at right: Family Tree DNA's myOrigins).

In FTDNA, the map may also display pins showing the locations of your matches' most distant known ancestors.

For those who are interested, other tools allow your DNA kit to be compared with ancient DNA, such as Neanderthal.

 

Health Reports

23andMe in the US was initially a health reporting company that expanded into genealogy matching.  No health reporting is available in Australia or New Zealand.  Limited health reporting is available to residents of the US, UK, Ireland and Canada.

Autosomal DNA raw data from Family Tree DNA, 23andMe or AncestryDNA may be uploaded to www.promethease.com to generate health reports, for a cost of US$ 5.  Refer to the information and videos on the Promethease home page.

 

Testing Company

There are three major DNA testing companies for genealogy - Family Tree DNA, 23andMe and AncestryDNA.

Family Tree DNA is popular for testers from Australia & NZ, as it has a large international database, sells all test types, is the most affordable for international postage, requires no ongoing subscription, hosts thousands of surname and geographical projects, and provides easy analysis tools.

23andMe has a large database, although testers are generally more health-focused rather than interested in genealogy.  It has good analysis tools, but its compulsory international courier service makes it very expensive for Australians and New Zealanders.

AncestryDNA was previously US-only, but launched in Australia & NZ, UK, Ireland and Canada during 2015 and has now surpassed 3 million testers.  Ancestry's huge collection of member trees can be linked to DNA results to help identify relatives through Shared Ancestor Hints.  Its DNA matching features work best with a subscription and a public family tree.

For a review of features and pricing of the three DNA testing companies, refer to Which DNA testing company should I use?

 

Projects

Family Tree DNA hosts over 9000 projects, including for surnames, geographical regions, and haplogroups.

Australian Settlers DNA, Australian Convicts DNA, New Zealand DNA, British Isles DNA by County, Ireland Y-DNA and Ireland mtDNA are just a few projects that may be of interest.

 

Finding Cousins

Currently, the favourite amongst genealogists who don’t have a specific need to test the direct male or female lines is an autosomal DNA test.  Both AncestryDNA and Family Finder are very popular in Australia & New Zealand, but review both your goals and the pricing and features of all three genealogy testing companies before you buy, to ensure your choice suits your goals.

Expect to be matched with a range of biological relatives, up to 5th cousins back or further.

Once your results are released, the fun then starts with corresponding with your matches and comparing trees and research to determine your shared ancestors.  As more people test, everyone’s chance of finding closer matches improves.  It is also very useful to test siblings and other cousins, as they may share DNA with cousins that you don't.

 

Resources

For beginners, there are plenty of free links and resources.  As you gain experience, there are third-party sites & tools you can utilise to analyse your results and find additional matches.

Tropical FNQ palm treesResources on DNA are plentiful, and if you live in Cairns or are planning a holiday in tropical Far North Queensland, our DNA Interest Group meetings and Drop-In DNA Clinics are a lively place to learn and be guided in your DNA research.  Newcomers, visitors and tropical holidaymakers are always welcome!  For Facebook users, there is an Australian & NZ support group and a UK support group.

Exploit your DNA to make exciting new discoveries in your family tree!

 

 

 

 

 

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