Pizza and Who do you think you are?

Transcription

1 Pizza and Who do you think you are? an overview of one of the newest and possibly more helpful developments in researching genealogy and family history that of using DNA for research

2 What is DNA? Part 1 It is DeoxyriboNucleic Acid, a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information.

3 What is DNA? Part 2 A genealogical DNA test looks at a person's genome (A genome is an organism's complete set of DNA, including all of its genes at specific locations). Results give information about genealogy or personal ancestry. In general, these tests compare the results of an individual to others from the same lineage or to current and historic ethnic groups.

4 So, I can spit in a tube and get my whole family history, right? If you have a patron who comes up and says this, here s what you should explain. No, you can t. Here s where you can find out more. Here are the main companies that do the testing.

5 What companies can do this? Ancestry.com, Family Tree DNA, and 23 and Me ---problem is, they do not talk to one another, and public free databases like GEDMATCH are not used. Do you go with the company with the largest database or the best testing?

6 Useful Terminology BASIC DNA TERMS Allele / Gene Bases A Adenine T Thymine C Cytosine G - Guanine Chromosomes DNA Genome Locus/marker GENETIC TERMS Haplogroup Haplotype MRCA Phylo-tree SNP STR Sub-clade Used with permission from Shannon Combs-Bennett (c) 2014

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8 Last boring picture of DNA

9 What are some common mistakes? Believing that DNA will fill in your family tree. I don t have an ancestor s DNA. They are dead. I don t like needles! I am female. How do I test for male DNA? The DNA will reveal medical problems.

10 What is Autosomal DNA It is the DNA you inherit through autosomal chromosomes, not through the sex determining chromosomes. An autosome is any of the numbered chromosomes, as opposed to the sex chromosomes. Autosomal DNA tests can be used to confirm relationships with a high level of accuracy for parent/child relationships and all relationships up to the second cousin level.

11 What is Y-DNA Tersely, it is the chromosome that determines maleness, and is passed from father to son.

12 Results For Men

13 Y-DNA Results Y-DNA results can be used to verify the male lineage Since men do not get a Y chromosome from their mothers, a paternal line can be traced

14 What is mtdna mtdna is passed from a mother to all of her children mt = Mitochondira

15 mt Dna has only women

16 Results For Women

17 Tersely put

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19 From Blaine Bettinger -

20 Talk about diminishing returns

21 Wait What Just Happened? Parents Children Grandchildren Great grandchildren Image from ricochetscience.com

22 Example Result: FTDNA Chromosome Comparison

23 This is mine from FT DNA

24 This is a sample from FT DNA Orange = Mom Blue = Mom's brother

25 Example Results: FTDNA Reconstructed Sapiens Reference System Shannon Combs-Bennett (c) 2014

26 Example Results: FTDNA

27 My own results

28 From my own AncestryDNA

29 A sample tree from my DNA match cousin.

30 My guys 2 nd marriage

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32 Most of my distant relatives have their kits at Ancestry.com - which has much faster growing database - but I prefer FamilyTreeDNA for the better analysis tools. and someone else wrote: My entire project plan is about using FTDNA tools in conjunction with GedMatch. I sure hope that this GedMatch issue is temporary.

33 Unhappy campers 23andme just shot themselves in the foot with their price increase. Leaving ancestry and ftdna as the top dna contenders. I have the DNA results from about 5 yrs ago. This shows me nothing. There is no map There is a page that shows numbers but the explanation is worthless and meaningless I paid for both DNA test and membership and WOW did I get ripped off

34 From GEDMATCH.com: We regret we had to make the decision to stop accepting FTDNA [FamilyTreeDNA.com] DNA uploads. FTDNA has threatened to sue GEDmatch over claimed privacy issues. We have been asked not to discuss the details, because it would be to FTDNA s disadvantage. Suffice it to say that FTDNA s own site seems to currently violate these same issues.

35 Haplogroup Migration Map

36 An ad from 23andMe

37 From My Heritage: Here are some of our price reductions during this special DNA sale: mtdnaplus: Was $129 Now only $59 maternal line Powerful combo for male customers only: Buy Y-DNA37 + mtfullsequence, get Family Finder free Was $307 Now only $248 best value for all lines. Y-DNA111: Was $359 Now only $299 highest resolution test on the paternal line.

38 You won t have to give blood.. You can use your own DNA via a saliva tube. It can help confirm or refute! your research. You might find more family links

39 Some valid concerns Will insurance companies see the results? NPE s (adoptions, illegitimacies) What about law enforcement? Maybe Your Relative s DNA Could Turn You Into a Suspect from WIRED.com

40 What do you think about this? A single gram of DNA can store 1 trillion gigabytes and last for 2,000 years.

41 centimorgans If you have 10 centimorgans in common with another person, there is a 99 percent chance that you are related (and just by sheer chance). FT DNA can accept Ancestry data But if you do another test it could very well give you a different result! Tree can be blocked from view

42 Centimorgans are measurements of how likely the segment is to recombine as it passes from parent to child. Segments with higher cm values have a greater probability of recombining in any one generation. Therefore, when you share DNA segments with larger cm values with a match, your common ancestors are likely to come from generations that are more recent.

43 For example, known second cousins on average share centimorgans (cms), but in extreme cases can actually share as little as 47cMs or as much as 760cMs. Conversely, the relationship between pairs of individuals sharing 212.5cMs has been found to be anywhere between aunt-or-uncle/niece-ornephew and third cousin once removed

44 Autosomal DNA is inherited equally from both parents. The amount of autosomal DNA inherited from more distant ancestors is randomly shuffled up in a process called recombination and the percentage of autosomal DNA coming from each ancestor is diluted with each new generation. When interpreting autosomal DNA statistics, one must be careful to distinguish between the distribution of shared DNA for given relationships and the distribution of relationships for given amounts of shared DNA. For example, known second cousins on average share centimorgans (cms), but in extreme cases can actually share as little as 47cMs or as much as 760cMs. Conversely, the relationship between pairs of individuals sharing 212.5cMs has been found to be anywhere between aunt-or-uncle/niece-or-nephew and third cousin once removed. Autosomal DNA is inherited equally from both parents. The amount of autosomal DNA inherited from more distant ancestors is randomly shuffled up in a process called recombination and the percentage of autosomal DNA coming from each ancestor is diluted with each new generation. For example, known second cousins on average share centimorgans (cms), but in extreme cases can actually share as little as 47cMs or as much as 760cMs. Conversely, the relationship between pairs of individuals sharing 212.5cMs has been found to be anywhere between aunt-or-uncle/niece-or-nephew and third cousin once removed.

45 Where can I find out more? Blaine Bettinger has a blog: And also

46 From the RGS s February speaker: For the very first time, GGP offers hands-on exercises in areas of Y-DNA, mtdna, X-DNA, atdna, the Genealogical Proof Standard, ethics, and more. DNA evidence is increasingly necessary to confirm even the most documented and researched pedigrees. DNA evidence can also help examine some genealogical questions that appear nearly hopeless with traditional genealogical research.