Autosomal (non-gender) DNA is accurate to 4 generations (20 centimorgans DNA and larger value). It is offered by all sites: Ancestry, My Heritage, 23&Me, and Family Tree. One generation is about 25 years. Autosomal is usually sufficient to discover to great-grandparents, far back as most want to know.
Depending on subscription level, Ancestry is most expensive. Has the largest database. My Heritage has a large number of persons from Austria Hungary (1860s to today). Nice search features.
I joined all of companies above, except for 23&Me. You can upload autosomal DNA test from Ancestry to My Heritage and Family Tree fora nominal fee.
My Ancestry DNA ethnicity is about 90% from Slovakia to 4 generations. My Heritage shows 17% from Scandinavia (more on that later).
I uploaded my Ancestry DNA zip file to GEDmatch.com. They accept DNA from ALL companies. Will find hundreds of DNA matches from their database. Standard Membership is free with email registration. They also accept GEDCOM or Family Tree files. For $10 a month (which can be turned on and off as needed) they offer many sophisticated DNA analysis tools.
Now for the BIG ONE. I also took Y paternal and MT maternal tests on Family Tree - accurate to 10 and 60+ generations, respectively. Paid for in depth analysis of paternal test at YFULL.COM, located in Russia.
I find most DNA ancestors on Ancestry, fewer on My Heritage and fewest on Family Tree. However, Family Tree recently started finding DNA matches to the Human Haplogroup Tree, which traces back 300,000 years ago.
This week Family Tree began a new feature: HAPLOGROUP DNA MATCHES.
I share DNA with JRR Tolkien (1892-1973); Peterson Gunnarsson RAMBO (1611-1698) from Sweden who brought RAMBO apples from Europe to America, and first settler in Jamestown (William FARRAR, 1583-1637) who survived the 1622 Indian massacre, and a Manx Viking (900-1250).
Our common ancestor for ALL four was born about 5,000 years ago.
I've discovered their DNA cousins living today. One has Austria Hungary ancestors to me. To my surprise, William FARRAR is also on his Family Tree.
Finally, I'm related to Albert Perry, born into slavery 1820. We share a common ancestor 234,000 years ago (not a misprint) born in Cameroon. I share DNA with a family today that provided DNA for the Haplogroup tree.
My wife's ancestors are Welsh. She is 1C7R to Joseph "The Signer" Hewes (1730-1779). He signed the Declaration of Independence. Was first Secretary of Navy for George Washington. On mother's side, she is 6C by blood to TECEMSUH (1768-1813) the famous Indian.
Before this week I told people my great grandparents had to eat grass to survive at times because they lived in Austria Hungary - 97% were peasants. Now I don't take a back seat at my wife's genealogy table.
Still not sure about maternal grandparents to Charles William BIDZILYA (1892-1978), born in Dorobratovo, Ukraine. Genealogy investigations by Maxim AVERIN in Ukraine stopped at 1909. Ukraine ancestors left few records. Many were destroyed by war. DNA is the only way to find them.
This week I connected Charles parents by DNA to two persons born in villages near Charles. My Ukraine tree now goes back about 7 generations.
I will hire a genealogist to confirm these DNA matches. Hopefully with new names and places records will be found.
Obviously, I'm excited about genealogy. It is hard work and takes a lot of time as C-RS member's stories demonstrate. I recommend using DNA for every serious researcher. If anyone read this far, please contact me to learn more.
Hope my C-RS subscription fee is not based on length of the typed word.