There are several firms that do DNA testing for
individuals and groups doing genealogical research as well as research
concerning ethnicity and genetic characteristics. It has developed
into a huge and profitable business. We chose Family Tree DNA Ltd., whose
headquarters are in Houston, Texas, because they are user friendly and have the
largest number of participants in their data base. In 2000, Family Tree
DNA was founded by Bennett Greenspan and Max Blankfeld. It was the first
company dedicated to direct to the consumer DNA testing for genetic genealogy
and family history research. For surname studies, the Y chromosome
(Y-DNA) test is used. Surnames are handed down through the paternal line
making Y-DNA testing the perfect tool for paternal ancestry research because
this DNA material is only passed from father to son. For this reason only men
can participate in the test. The results are classified by haplogroup and
haplotype.
Haplogroups are the major branches of the
Y-chromosome tree. They are defined by Single Nucleotide Polymorphisms (SNPs)
which have accumulated over many generations as the Y-chromosome is passed from
father to son. These SNPs map the paths back to the single common male ancestor
from which all from that group descend. Haplogroups are mainly used for
anthropological and deep ancestry research because the time frames are usually
prior to the adoption of surnames. Haplogroups are useful for researchers
who are studying human migration patterns and have archeological value.
They can also be used to study tribal groups in early European history.
In layman’s terms, this data can tell you if you are a Celt, Viking,
Anglo-Saxon, or if your ancestors spent the last Ice Age in Iberia.
The Y-DNA haplotype is used for genetic
genealogy. It deals with a more recent time frame relating to one’s
ancestor and all the men that descend from him during the time when surnames
were coming in use. One’s father, grandfather, great-grandfather
and so on, all carry the same Y chromosome DNA. All the males that
descend from the same forefather will have the same or very similar Y-DNA. Once
a man tests his Y-DNA, all the other men that have tested who also descend from
that common male ancestor will show up as a match in the DNA results.
When a Y-DNA haplotype match group is located the next step is genetic
genealogy.
Genetic genealogy compares the haplotypes of two
or more people that are a Y-DNA match to determine the degree of genetic
relationship between their respective lines. The closeness of the match,
or distance, gives an indication of the time to the shared paternal
ancestor. At this point, other factors become important such as having
the same or similar sounding or meaning surname, or a surname’s clan
connections, or the geographic location of a match. All these factors help to
determine if two related lines are of genealogical interest. Many
families triangulate with members of their match group to fill in gaps, or smash
through brick walls, to add to their family’s genealogy and locate members
of their family still in the old country. An example of this; let us say
Y-DNA testing confirmed that three families, that did not previously know they
were related, actually share a paternal kinship dating to circa 1700.
Family A might have part of the story, and then match Family B which has more
of the story, which matches Family C still in Ireland which has even more of
the story. When the stories of Family A, B, and C are put together, often
a complete shared family history and genealogy are revealed. In the case
of many Irish and Scottish families, both surname and non-surname matches are
important because surnames were not fixed until the early modern era in parts
of Scotland and Ireland. Members of the same clan that share paternal
ancestry may not share the same surname, but in the primary sources it is often
possible to discover a group of surnames linked to a paternal line. Y-DNA
haplotype testing allows primary sources from families in your match group to
be used with confidence since paternal kinship has been confirmed.
The actual process of starting a project is
simple. You go online to the Family Tree homepage, exchange emails with
their contact people and in a matter of minutes you will have DNA Project up
and running. Next, order your DNA test via credit card. The test
itself is also easy to do. You have two sterile cotton swabs with which
you take a tissue sample from the inside of your mouth by rubbing your inner
cheek. This procedure is done twice 24 hours apart. The samples are
placed in sealed containers which are mailed back to the lab and some four to
six weeks later you receive your results via an email message.
Is there any way to do genetic genealogy for women usng dna? I don't have any living male to get dna from.
ReplyDeleteIs there any way to do genetic genealogy for women usng dna? I don't have any living male to get dna from.
ReplyDeleteI thought I did not have a male either, but on 23 and Me, I bumped into my grandfather's full brother's grandson with my same family surname and same great grandfather. We share extensive DNA, and he matches all of my paternal cousins. From the people who study this, they say I may use his as my father's Y DNA haplogroup. Keep watch for the same situation. Serendipity.
ReplyDelete