Tuesday, August 11, 2009

Family History and DNA Testing

This article is one in a series of session reports from the recent BYU Conference on Family History and Genealogy. I tweeted the session live, but I hate to send you to Twitter to read them because they appear there in reverse chronological order. I’ve straightened them out for you here. Additions are shown in italics.

Tuesday, 28 July 2009

"Family History & DNA Testing" by Denise Mortorff (2:57 PM Jul 28th from TweetChat )
involved for 14 years in a surname study online (3:00 PM Jul 28th from TweetChat )
Got involved in DNA to confirm some members suspicions about relatedness. (3:00 PM Jul 28th from TweetChat )
Mostly talk male testing, but at end will give a maternal example. (3:01 PM Jul 28th from TweetChat )
Striving for balance between depth and understanding. (3:01 PM Jul 28th from TweetChat )
She's going through the basics. (3:08 PM Jul 28th from TweetChat )
(Sorry. It's late in the day and I'm slowing...) (3:08 PM Jul 28th from TweetChat )
She's showing an example result from the Combs-Coombs &c International DNA Study. (3:10 PM Jul 28th from TweetChat )
She feels that you only need 35 to 40 markers for a surname study. (3:11 PM Jul 28th from TweetChat )
Has 70 people in her study. (3:11 PM Jul 28th from TweetChat )
National Geographic doesn't test enough markers for other than deep ancestry analysis. (3:12 PM Jul 28th from TweetChat )
Colors on the chart indicate common or different marker values. (3:13 PM Jul 28th from TweetChat )
Showed Relative Genetics map for haplogroup I 1c?. (3:14 PM Jul 28th from TweetChat )
The statistical place of origin has shifted south as more samples have been gathered. It is in the German area of Europe. (3:15 PM Jul 28th from TweetChat )
DNA can prove or disprove relatedness. (3:16 PM Jul 28th from TweetChat )
Can connect, validate, and rule out lineages or branches in a family tree. (3:17 PM Jul 28th from TweetChat )
Can connect surnames that otherwise could not be assumed to be related relying solely on spellings. (3:18 PM Jul 28th from TweetChat )
Denise is emphasizing that without lineages, using DNA with genealogy isn't going to help. (3:37 PM Jul 28th from web)
Showing a case study where mtDNA helped identify an ancestor. (3:38 PM Jul 28th from web )
Showing http://www.combs-families.org/combs/dna/ (3:40 PM Jul 28th from TweetChat )
She's showing some reports that the DNA companies ought to provide. Migration maps. Deduced DNA charts for ancestral lines. (3:43 PM Jul 28th from TweetChat )
Done with lecture. Now taking questions. She uses 43 marker tests. No more than 2 or 3 differences out of 43 to 46. (3:47 PM Jul 28th from TweetChat )
Showed us Jonathan Combs descendants have quickly mutating DNA. Lots of one-off matches. (3:49 PM Jul 28th from TweetChat )
That's it for today. See you tomorrow. (4:02 PM Jul 28th from TweetChat )

Remember that tweets are limited to 140 characters. Less the #byugen hashtag, each tweet could not exceed 132 characters. Hence, tweets often use abbreviations, bad grammar, and lack proper punctuation.

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