10

This could also be explained if the parents share DNA. If you took the same test with your father and it also was > 50%, it could indicate they are distantly related. A single shared chromosome could appear as ~52%. Even if dad only shows 50%, he could have passed the shared DNA but mom did not pass it down, so it would overlap with the DNA mom did not ...


8

The ISOGG Wiki's article on Autosomal DNA statistics explains the concepts in the previous answer in much more detail -- and includes links to the AncestryDNA white paper that explains Ancestry's matching algorithm. Humans have 22 pairs of chromosomes plus the X/Y chromosomes. Assuming nothing went awry when the chromosomes were sorted out in the ...


8

Absolutely not. The amount of saliva is a factor in whether or not you get DNA results at all. If you have them, that's it. While there is such a thing as "partial results" it's because you need multiple passes of the DNA sequence to make sure there aren't errors. No testing company will give you results if they don't get enough passes. A very small ...


7

In the colonial period, language usage for kinship terms (and other terms) was not necessarily the same as it is today. Several of the 'how to' books I've read have said that in the colonial period, 'junior' and 'senior' were not necessarily indicative of father/son, but simply meant 'the younger' or 'the elder' if there were two men with the same name in ...


7

The result should be reliable in that it shows a close relationship. As shown on the Autosomal DNA statistics page on the ISOGG Wiki, the relationship is almost certainly one of these: one of you is half-sibling of the other one of you is aunt or uncle of the other one of you is grandparent of the other one of you is double-first-cousin of the other Some ...


6

Just a note that you should not automatically jump to the conclusion that you and your probably-half-sibling must share a father instead of a mother; young unmarried pregnant women were often pressured to give away their babies and never speak of it again. Your DNA results should be able to show whether you two specifically share an X chromosome match or ...


6

A person will share roughly 3% of their DNA with a second cousin. A person shares 50% of their DNA with their father. If you have the luxury of testing the autosomal DNA of both the person and the second cousin, then that will obviously give you the answer. However, I expect that is not the case. If any other close relatives (siblings, parents, aunts/uncles)...


6

The tests can be trusted. You are not half-sisters. Paternal half-sisters, minimally speaking, share an entire X chromosome, as females inherit one X chromosome from their father. Beyond that, they share about 25% of their DNA all told. I recommend reading either of Blaine Bettinger's books on genetic genealogy. Your local library may have copies.


6

Personally I would parse it as follows: Deeply missed by their seven children (numbered 1-7) and their spouses, 26 grandchildren (letters a-z) and their spouses, and 7 great-grandchildren (letters A-G): 1. Ruth Simpson and her children a)Louise Kohler and Chris Harper, and A)Danielle; b)Shelagh and Leigh Potter and ...


5

Second cousins would be the "third degree of blood relationship". People who were related more closely than that were not permitted to marry (without special dispensation). Source - Wikipedia As the above table shows, second cousins were not the only family relationship that would qualify as third degree of blood relationship, but in cases like this it ...


5

The Shared cM Project 4.0 tool v4 from DNA Painter project mentioned in this blog post makes it simple. To jump straight to the relationships a 2,200 cM match may suggest just append the number at the end of that URL: https://dnapainter.com/tools/sharedcmv4/2200 It computes using the information in this chart from the August 2017 updated to the Shared cM ...


5

My initial assessment is: I think it quite unlikely that someone would be referred to "Our Mother" on a headstone, without some mother-child relationship present. It may not be a genetic mother-child relationship, but consider whether Harriet may be a step-mother, or grandmother. The odds of two English women who bore the same relatively uncommon surname ...


5

A possible explanation for these results is that you have more than one relationship – maybe you are half-siblings and also share a more distant relationship on your mother's side. For example, the man may be your half-brother because you share a father, and also be a second or third cousin via his mother. Just to diagram this possible scenario to give you ...


5

The Shared cM Project 3.0 tool v4 suggests these possible relationships for 2,063 centimorgans: I think the age difference of just a few years between you and this person lets us rule out grandparent to grandchild and great aunt/uncle to great niece/nephew. 2,063 is considered a little low for full siblings because they normally fall in the 2,209–3,384 ...


5

According to the Shared cM Project, a 1390 cM match is in your case much more likely (90%) to be either a half sister or an aunt/niece than it is (10%) of being a first cousin, half-aunt or half-niece. Ancestry recently started providing this type of percentage information if you click on the little "i" icon that is to the right of the shared cM and ...


5

Ancestry DNA uses scientific methods to attempt to give you valid matches. They use their own proprietary technique to detect Identical by Descent (IBD) segments and to match people. They work to ensure as few false-positives as possible. Much of their methodology is described in their Ancestry DNA Matching White Paper. Based on Ancestry's methodology, I ...


5

Half-sibling is not the only likely relationship at that cM range, it also includes aunt/uncle and niece/nephew. So, depending on the age of the outside match, it could be either your uncle's half-brother, and therefore also your uncle; or your half-brother, and therefore your uncle's nephew. https://dnapainter.com/tools/sharedcmv4-beta


5

The sex chromosomes are likely what make up the discrepancy. I'm guessing you are male. Females will share exactly 50% of their DNA with each parent, since they inherit 22 autosomes from each parent, and an X-chromosome from each parent. Males will share slightly more DNA with their mother than their father, since they also inherit 22 autosomes from each ...


4

I'll self-answer, as I've made some progress, although not reached a complete conclusion yet. I've learned a couple of things along the way, too: 1) Ancestry's default search doesn't work the way I'd assumed - I thought it would include Soundex matching, but it doesn't. To get thorough "inexact" matching, you have to use the "exact" checkbox - rather ...


4

Based on the information provided I belive are only one of two scenarios are possible. You share a grandparent on your mothers maternal side. You are half brother's and sisters with the same mother; not your fathers side. You can reference the ISOGG Autosomal DNA Comparison Chart. But a more practical example of a similar situation is my grandfather. ...


4

The range of DNA shared between half-siblings and first-cousins overlaps (see The Latest Results from the Shared CM project); you and your half-sibling might have a shared DNA amount at the low-end for half-siblings but the high-end for first-cousins.


4

Unfortunately, Genex (www.swabtest.com) is not a testing company I am familiar with. They seem to have their own custom tests and custom results without giving you the ability to compare yourself against all the other people in the test base as you can do with the standard testing companies. If Genex allows you to download your raw data, you may be able to ...


4

I had a similar situation with DNA suggesting a half sibling. When looking at shared matches, my half sibling and I shared the same relatives On both of my father’s parents side. No doubt he is my father’s son. I have met my half sibling and, after the initial shock, it has been a blessing for me.


4

According to the Shared cM Project, the match between half siblings can range from 1317-2312 cM. Your dad is well within the accepted half-sibling range for both his half-sister and his half-brother. As you know, 2085 cM is too small a match for full siblings (range 2209-3384 cM). 3/4 siblings is certainly possible by the numbers, but you've already ...


4

You don't share any cM with the man because you have a 50-50 chance of inheriting any given segment from either of your parents. While it's uncommon for a 100+ cM segment total to turn into 0 cM in one generation (because segments split up randomly so most children would get a piece of one or more), it can and does happen. Just the luck of the draw. Going ...


4

The advantage of more people testing is that you can use the cM ranges better. Here, your aunt matches full siblings with different cM totals, even though they have to be the same relationship to her. You are looking for relationships where both 503 and 348 cM are within the range. Using the Shared CM Project, these include: Great grand aunt/uncle. Great ...


4

It means that the Chinese ancestry comes from your paternal grandfather's side, and 50% and 100% are good estimates, but the exact percentages could vary. Exactly half of your DNA is from your Dad, and exactly half of his DNA is from his Dad, but the DNA you got from your Dad is a mixture of your paternal grandfather and paternal grandmother's DNA. While ...


4

This website presents information from a simulation study of first cousin DNA matches done by an expert statistician, Philip Gammon. https://dna-explained.com/2017/09/27/first-cousin-match-simulations/ The first graphic shows the distribution of centimorgans among 200,000 (simulated) first cousin matches. The height of each bar gives the chances of each ...


3

According to Blaine Bettinger's Shared cm Project - Version 3.0: Cluster #2 is: Half Sibling, Aunt/Uncle/Niece/Nephew and Grandparent/Grandchild Cluster #3 is: 1st Cousin, Half Aunt/Uncle/Niece/Nephew, Great-Grandparent/Great-Grandchild and Great-Aunt/Uncle/Niece/Nephew The 99th percentile range of Cluster #2 is 1294 cM to 2230 cM with an expected value ...


3

Another way you may see this relationship described is "half first cousin", meaning the cousins only share one grandparent. The Shared cM Project is my go-to source for such information. According to their most recent data the expected range is between 236 and 704 cM, with an average of 554 cM. Note that this range is based on a small sample size of 23. It ...


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