Questions tagged [autosomal-dna]

For questions about autosomal DNA testing for genealogical purposes. Autosomal DNA is the majority of the DNA in our chromosomes, and is passed by both mother and father to child. This includes tests provided by AncestryDNA, 23andMe, and FamilyTreeDNA's FamilyFinder.

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1answer
804 views

Why are the lengths GEDmatch.com Chromosome Segment Matching segments not proportional to their cM?

The GEDmatch.com Chromosome Segment Matching report has the following legend: One of my reports has the following triangulation match: The purple segment (< 5 cm) is 102912701 - 111046063 (4.189 ...
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1answer
5k views

Which Gedmatch admixture calculators are most useful for an individual of predominately African American descent?

According to my Ancestry DNA autosomal test results, my admixture is 70% Sub-Saharan African, 25% European and 4% Native American. Which Gedmatch admixture calculators might I find particularly useful ...
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1answer
1k views

How am I really related to a person with 1246 cMs and no shared X-DNA?

I have a cousin who is coming up as having 1246.5 centimorgans in common the largest being 103.2 and 1.8 generations. We have no shared X DNA found. I am a female and he is a male. We are supposed to ...
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3answers
2k views

Converting AncestryDNA 1.0 file format to 2.0 and vice-versa?

I noticed today (1 Jun 2016) that AncestryDNA.com has converted over to their new 2.0 file format, where as about a week ago they were still on the 1.0 format. Both file formats state they are ...
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2answers
1k views

Is this adopted DNA match my niece or half sibling?

The adoptee and I have an autosomal total segment of 2138.8 cM the largest segment is 122.6 cM. The X-DNA is 115 total with the largest segment at 95. My son matched the adoptee with autosomal 1124.1 ...
6
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3answers
4k views

Determining if an autosomal and X-DNA match is my half-sibling?

I am adopted and have info on my maternal side, but not paternal. I recently got a match through AncestryDNA with someone saying we were close relatives. This man and I share 2086 centiMorgans in ...
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2answers
2k views

Is the Autosomal DNA testing ever wrong on relationships?

I have done the Autosomal DNA test through Ancestry.com and uploaded it gedmatch.com. In Ancestry.com I matched several people that would be 1st or 2nd cousins. I also matched with them on gedmatch....
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2answers
2k views

How much DNA would match a 5th cousin once removed?

I have 5 autosomal DNA tests (from cousins and siblings of each other) that are theoretically all 5th cousins, once removed, from another DNA test. Using GED Match autosomal compare, I found these ...
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3answers
2k views

Is it possible to inherit the physical look of one ancestor specifically?

My family and I are Swiss, but my dad has a very Mediterranean look. His skin tends to be copper-coloured, he has very dark and very curly hair. This is especially obvious in photographs where he ...
3
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1answer
41k views

Why would Native American Ethnicity not show up in Autosomal DNA results?

My 3rd great grandmother was Muskogee. I have no Native American DNA according to ancestry.com, yet my DNA matches also share this ancestor in our family trees. Why, if we match DNA-wise and ...
9
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1answer
588 views

My Father passed away - next test(s) on what remains of his DNA sample?

I posted this general question over at the forum on FamilyTreeDNA. Though I received a reply, there is still no answer to my question, so I thought I'd try my luck at posting here. Anyhow, in early ...
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2answers
3k views

Understanding chromosomes and centiMorgans

I am very new to this so please be patient with me. I had a DNA test via Ancestry which didn't tell me very much and so I uploaded the data to GEDmatch. My top 3 matches are: A:11 chr matches, ...
5
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1answer
358 views

Is there a tool to generate a parent's DNA sequence from their children's?

I have the DNA (via Ancestry DNA) of a mother and 3 of her children, one son and two daughters. I know I can get an approximation of the father's Y-chromosome from his son. Is there a tool to ...
2
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0answers
346 views

Autosomal DNA Chromsome Browser - Is there such a thing as a 'family trait' of shared segments?

I realize the passing of genes is approximately 50/50 (reference Generational Loss of Data with DNA testing) with each generation and which genes are passed are commonly referred to as 'random' based ...
4
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1answer
1k views

What settings to use in GedMatch to confirm a seventh generation relative sharing DNA?

I have a relative, Nancy Ann Trigg, who is 7 generations removed from me, so I expect I have one part in 2^7 (128) of her DNA in my autosomal DNA test. I want to confirm this relation and found ...
6
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1answer
247 views

What does it mean for two DNA half-matches to not match each other?

I'm looking at my gedmatch.com kit A951428 and found close matches at the same overlapping location of chromosome 3: Kit Chr Start Pos End Pos cM SNPs F236166 3 25,435,600 38,396,...
2
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1answer
2k views

How do I determine our common ancestor?

I'm trying to find a match for DNA that is narrowed down to go through my dad's line and another person's paternal line. I'm thinking if I could compare our fathers' pedigree surnames it might reveal ...
2
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1answer
890 views

Finding my Great-Grandfather when DNA test not conclusive?

I am from Japan and I have been trying to identify my great-grandfather who was British. For more background these are two questions that I have asked here previously: Finding UK record(s) of ...
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3answers
2k views

Interpreting X DNA?

I guess I need a "dumbed down" explanation of these things, since I don't understand the explanations I've read. First, I have a 3rd cousin match from Ancestry who uploaded his info for me on ...
5
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3answers
823 views

Determining where particular parts of ethnicity percentage from DNA come from in family?

I completed a DNA test, and the results stated that I am 77% African 20% European 2% Native American and 1% Asian. From the results of this test, is there anything in the results that would tell me ...
2
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1answer
1k views

What would the starting shared cM number be for abnormally close relationships in Autosomal DNA test?

I have seen in the examination of family trees where individuals sharing a great grand parent marry and have children, somewhat commonly in pre-American Civil War, which I would think would create ...
4
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1answer
2k views

Is ancestry.com DNA test accurate with respect to native american descent?

Both myself and my wife believe we are descendants (each on the order of 1/16) of native americans, yet for the Ancestry.com autosomal DNA test, the ethnicity estimate shows nothing for native ...
3
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1answer
430 views

Calculating the relationship from the RAW autosomal result file between two individuals?

My question is about the Ancestry Genealogy tests (Autosomal DNA tests) being offered. Suppose a consume DNA testing service company, like 23andMe/Ancestry.com/FamilyTreeDNA, extracts two people's ...
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4answers
97k views

How long do results typically take for Ancestry DNA test?

I ordered a family DNA test from Ancestry.com and sent it in for lab processing, they received it and the web page shows: Test in Process: Lab processing began on 02/26/2015 It is now four days ...
7
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3answers
22k views

How to interpret a reasonable X DNA Match, but no shared cM Autosomal result on GEDMatch?

I recently uploaded one of the Autosomal DNA results I manage to GEDMatch.com and ran the X-Match routine and came up with a puzzling result. The strongest result by far on the test has 37.2 shared ...
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3answers
2k views

Generational Loss of Data with DNA Testing

I have personally done the Y-DNA, the add-on Y-block with FamilyTreeDNA, mtDNA, and new FamilyFinder/AncestryDNA (via Ancestry) which i plan in transferring to FamilyTreeDNA just recently as a base ...
8
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1answer
1k views

Working with autosomal DNA results

I have the automsomal DNA results for myself, 3 full sisters and 1 half-sister. We all share a mother, and we all tested with familytreeDNA. Our results are uploaded to gedmatch.com. Our parents are ...
7
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5answers
30k views

Finding haplogroup through raw DNA data?

I just got my results from AncestryDNA. What are some ways to find my haplogroup through my raw DNA data?
7
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1answer
4k views

What DNA test does 23andMe perform?

What DNA test does 23andMe perform? I can't find it stated anywhere on the website. The FamilySearch Wiki appears to imply that they perform the autosomal test and use that to infer Y-DNA and mtDNA ...
10
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3answers
37k views

What is the significance of “shared centiMorgans”?

I've had my autosomal DNA tested and the site I've used (FamilyTreeDNA) tells me that I have a "Shared centiMorgan length" of 48.08 with my closest match and the "longest block" is 28.89. FamilyTree ...

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