Linked Questions

8
votes
2answers
13k views

Genetic Distance to Generations Calculation for Y-STR DNA tests

As a follow-up to the Q&A on Generational Loss of Data with DNA Testing, which described generational detail loss really well for Autosomal, I am now looking for a calculation or some basic ...
3
votes
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 ...
8
votes
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
votes
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....
4
votes
1answer
3k 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 ...
6
votes
2answers
855 views

How likely is it that ftDNA made a mistake about my y-haplogroup?

I bought a National Geographic Geno 2.0 kit, tested by FamilyTreeDNA, and it says that I am of haplogroup that is very statistically unlikely for where my family is from. ftDNA did not check any SNPs ...
2
votes
1answer
1k 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 ...
2
votes
1answer
2k 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 ...
7
votes
2answers
155 views

Making Research Plans for studying the Genetic Genealogy of an Adoptee?

I have accounts on 23andme, gedmatch, ftdna, and ancestry.com's ancestrydna (all autosomal at this point). I also, even though I'm adopted (from bulgaria, have the full name, most recent address (as ...
4
votes
1answer
883 views

How to effectively communicate your tree for DNA Matches in first contact emails?

In genealogy in general there is a lot of ‘cousin hunting’ but in DNA Genealogy where people do not necessarily also have published trees for you to explore but you are reasonably close matches you ...
6
votes
1answer
296 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,...
4
votes
1answer
389 views

Looking for information on fathers of children born out of wedlock

My aunt had a baby out of wedlock in Florida in the late 1930s or as late as 1941. My cousin has asked me to find out who his father is. Were mothers required to name the father back then, and that ...
5
votes
2answers
136 views

Can group of matches on same segment with cM value in mid 20s be out-of-range?

WARNING: This is a question that involves endogamous genetic genealogy. (Not applicable to "normal" or "standard" DNA evaluation). I am still struggling to find some statistical limits/boundaries for ...
2
votes
0answers
349 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
votes
0answers
124 views

When the same name or family comes up in ancestors of DNA matches

I am pouring through the family trees of my DNA matches on both GEDMatch.com and Ancestry.com and, while it hasn't helped me solve any road blocks yet in the 2 years since I tested myself, I have ...