tag:blogger.com,1999:blog-1078247547416795390.post2827290834795327563..comments2023-07-24T08:05:40.473-04:00Comments on Information on Genes: Identifying half-siblings by genetic testsStevehttp://www.blogger.com/profile/15264977010144529019noreply@blogger.comBlogger35125tag:blogger.com,1999:blog-1078247547416795390.post-6571924365761980392020-12-04T01:19:14.197-05:002020-12-04T01:19:14.197-05:00Thanks for sharing this information with us. Get a...Thanks for sharing this information with us. Get and know about <br /><a href="https://www.dnacenter.in/dna-tests/siblingship-dna-test/" rel="nofollow"><b>Siblingship DNA Test</b></a>DDC Laboratories Indiahttps://www.blogger.com/profile/01603744892406180898noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-17488122781297374852017-01-10T11:32:09.164-05:002017-01-10T11:32:09.164-05:00I just got some information about a man that is de...I just got some information about a man that is deceased that i was never close to or known and how do i prove that He's biogical that I have 4 half siblings half brothers that one is requesting prove of genetics how do you prove thatKylehttps://www.blogger.com/profile/15459435322059804528noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-67605630384144059442016-12-27T09:50:37.428-05:002016-12-27T09:50:37.428-05:00HI I have a question. I have a half sister from th...HI I have a question. I have a half sister from the same mother as I. He father has lied to her her whole life. I ended up telling her the truth but now she's asking for proof. I'm wondering is there a test me and her can take to show we are related and are half sisters and we have the same mother . I'm willing to pay any amount of money to prove this I just don't know where to start.. Any help would be gratefully appreciate thank u Anonymoushttps://www.blogger.com/profile/17839129349768243558noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-21706389331142415302016-12-07T18:06:05.885-05:002016-12-07T18:06:05.885-05:00Hi Steve, I had my half-sister submit a dna test t...Hi Steve, I had my half-sister submit a dna test to ancestry where I have also had my dna done. She does not come up at all as a match. Is it possible ancestry is wrong? Is 23andme more accurate for half siblings on the fathers side? Is there anywhere else I can upload our data to check?Terry Newmanhttps://www.blogger.com/profile/09631371629941579408noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-27341037739741218802016-08-25T07:11:43.561-04:002016-08-25T07:11:43.561-04:00Tina,
Write to me directly, at ongenetic@gmail.com...Tina,<br />Write to me directly, at ongenetic@gmail.com, and tell me what test you had done (what company and how many markers). I don't know what those "probability factors" are. My statement that full and half siblings could not be mistaken is based on using a service with hundreds of thousands of markers that can be used to reliably calculate the fraction of the genome identical by descent. <br />SteveSteve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-39861275656005558452016-08-24T22:50:24.497-04:002016-08-24T22:50:24.497-04:00Hi Steve. I am reading your writing here with inte...Hi Steve. I am reading your writing here with interest as I just received results from a sibling test today that have me somewhat confused. The results (probability factor) suggested high for full siblingship ( 33,776.) and low for half siblingship ( 6478.). There is one father and two potential siblings that were tested. The father is deceased and I am the mother of only one of the girls. I am confused by the high number on the full sibling and low on the half. You wrote above that half-sisters could never be confused with full sisters. So now I am unsure as to trust the results I have recieied. Do you have any recommendations? Thank you in advance. Anonymoushttps://www.blogger.com/profile/10895874922014045110noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-10483279403295346162016-08-14T14:10:32.153-04:002016-08-14T14:10:32.153-04:00I answered this question above (for two sisters, b...I answered this question above (for two sisters, but the answer is nearly identical).<br />If you have a test by 23andMe or a comparable company (in which you are given the results from hundreds of thousands of variants across the genome), and you have access to the tools to analyze them (such as 23andMe's DNAview in DNA relatives), then the result will be clear. Both of you have to submit your DNA for testing. Also, the large database of users will help you to find the father (or fathers), and you can also upload your data to other sites. Also, you can share your DNA on the 23andMe DNA Relatives site anonymously.Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-55029290701663998412016-08-14T10:59:28.082-04:002016-08-14T10:59:28.082-04:00My half brother and I want to be tested to see if ...My half brother and I want to be tested to see if we have the same father. We know nothing about our father. We have the same mother, she is still alive. She does not want to share any information. Carmenhttps://www.blogger.com/profile/07532887774242381099noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-71154513799072682052016-05-28T22:30:24.467-04:002016-05-28T22:30:24.467-04:00Yes, the numbers sound right for your and your sis...Yes, the numbers sound right for your and your sister being full siblings. You should share half of your genome (identical by descent) with your full sister, and 3/4 of the genome should be covered (that's about 2800 cM, but the amount will vary - I share with my own, full, sister over 2376 cM). However, you would also share half of your genome with a half-sibling as well, but a different measure (half-IBD, covering about 1860 cM, but with wide variation). Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-79451820039180134182016-05-28T22:03:36.858-04:002016-05-28T22:03:36.858-04:00Is it possible to share an entire X chromosome wit...Is it possible to share an entire X chromosome with your father's sister? Yes. It means that your father's entire X was shared with his sister, and that is possible.Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-74740740725909000522016-05-28T13:06:23.207-04:002016-05-28T13:06:23.207-04:00I am an adoptee, but have been able to determine t...I am an adoptee, but have been able to determine the identity of my biological mother through adoption paperwork. I have located other children of my biological mother, and one sister agreed to DNA testing via AncestryDNA. When compared, we share 2,576 centimorgans shared across 83 DNA segments. Am I correct in thinking that sharing 55% of our DNA makes us full siblings? Ken Millerhttps://www.blogger.com/profile/11629683734584760063noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-87313482882891439172016-04-09T20:45:24.026-04:002016-04-09T20:45:24.026-04:00Is it possible to share an entire x chromosome wit...Is it possible to share an entire x chromosome with a 1/2 aunt (related on father side)TessyKhttps://www.blogger.com/profile/07062222203489373223noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-38827690157445775892016-04-09T20:43:16.554-04:002016-04-09T20:43:16.554-04:00If I find my 1/2 aunt on my father's side... w...If I find my 1/2 aunt on my father's side... will we share an entire x chromosome?TessyKhttps://www.blogger.com/profile/07062222203489373223noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-29329868990405462612016-02-14T12:15:15.933-05:002016-02-14T12:15:15.933-05:00If you have a test by 23andMe or a comparable comp...If you have a test by 23andMe or a comparable company (in which you are given the results from hundreds of thousands of variants across the genome), and you have access to the tools to analyze them (such as 23andMe's DNAview in DNA relatives), then the result will be clear. Full sisters are clearly different from half-sisters. Two half-sisters who share a father will share their entire X chromosome while two half-sisters that share a mother will not (they will share about half; the X will look like other chromosomes). Both of you have to submit your DNA for testing. Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-26822184370067430242016-02-14T04:26:16.297-05:002016-02-14T04:26:16.297-05:00My name is Deborah. My mother has been deceased fo...My name is Deborah. My mother has been deceased for 37 years and out of the blue, one of my sisters claims that Prophets in her church have told her we share the father but not a mother. She is reluctant to do a DNA test because she says it is only a paternity and not maternity test. Is there a test that can be done to prove that we shared a mother? goohttps://www.blogger.com/profile/06766237090773602864noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-43345886693998096472016-01-03T00:55:32.866-05:002016-01-03T00:55:32.866-05:00Could i swab both of my kids to determine if they ...Could i swab both of my kids to determine if they are full blooded brothers (same dad) without having the man present?Wanting to knowhttps://www.blogger.com/profile/14497422656228305866noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-31026683671288738252015-12-23T07:29:37.888-05:002015-12-23T07:29:37.888-05:00I strongly recommend 23andme. If you submit sample...I strongly recommend 23andme. If you submit samples from both of you to 23andMe, there will be no doubt about the result. https://www.23andme.com/<br />They use hundreds of thousands of markers. If she is your half-sister, you will share some DNA on most chromosomes. If you are full siblings, it will be considerably more and there will be regions where you share both chromosomes. If you have the same father, you will share the entire X chromosome. There will be no question about the answer, even without a sample from either parent.<br />(Half-sisters could look like niece/aunt or grandmother/granddaughter, and 23andMe might label you as such, especially if your ages are quite different, but half-sisters could never be confused with full sisters).<br />Also, if the father of one of you is unknown, that fact that there are one million people on the site will help you to figure out who the real father is, should you wish to do that. <br />The expense is perhaps higher than some other tests, but you get so much more information than some of the tests I've seen (less than 100 markers!) it's worth it. Also, there are forums to help you understand your results. <br />Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-77547641446326126692015-12-22T22:20:15.797-05:002015-12-22T22:20:15.797-05:00Hi Steve, Since I think I am from the same mother ...Hi Steve, Since I think I am from the same mother as my sister, but think we don't share the same father, and both patents have passed.Where is the cheapest place this test can b done to c if we are really sisters or half sisters. It's been a thorn in my side. I don't have much money to spend on this.I looked like my mother but nothing like my sister. What kind of test am I looking to have done to prove my suspicion? Anonymoushttps://www.blogger.com/profile/14942538170207028409noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-84388856674867482762015-11-20T20:02:25.894-05:002015-11-20T20:02:25.894-05:00I had a question about a home DNA test that was ju...I had a question about a home DNA test that was just done on my son. Instead of his alleged father swabbing his own mouth, he swabbed the mouth of his other son (which would be my sons half-brother). The DNA test came back that he was not the father( 0.00% assuming prior probabilty being 0.5) So with that being the conclusion would it be safe to say that they are not related at all? They matched numbers on 3 of the markers that were tested but i also had the same number.anonymous930https://www.blogger.com/profile/15160837438605674052noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-74450019939667053972015-11-16T04:33:24.193-05:002015-11-16T04:33:24.193-05:00I am a female and it has recently come to light m...I am a female and it has recently come to light my father had a son during an extra martial affair. I have no way of finding the woman's name he had the affair with since he is deceased. If I did 23 and me would it match genetic markers. Since I am XX and he would be XYAnonymoushttps://www.blogger.com/profile/01705418717368554737noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-26403887970283697242015-09-27T12:59:43.310-04:002015-09-27T12:59:43.310-04:00Genetic tests with many markers (such as Family Tr...Genetic tests with many markers (such as Family Tree or 23andMe) can reliably distinguish an aunt who is your father's full sister from one who is your father's half sister; this is based on the assumption that you and she can both submit samples. Steve On Geneticshttps://www.blogger.com/profile/15695457074293331422noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-87029126011939744792015-09-25T22:52:22.824-04:002015-09-25T22:52:22.824-04:00The sister of a man that is possibly my biological...The sister of a man that is possibly my biological father could possibly be his half sister or full sister. He is deceased. Can she still be tested for a siblings DNA test even if she is half?Anonymoushttps://www.blogger.com/profile/10299371388025659721noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-29688337761567153002015-08-24T03:50:52.848-04:002015-08-24T03:50:52.848-04:00The main focus concerns the diagnosis of hereditar...The main focus concerns the diagnosis of hereditary diseases <br />Every paternity establishes a special relationship. This not only means a lifelong emotional bond, but also includes extensive and ongoing legal obligations. As large as the scope of that relationship is, the questions can be just as excruciating if there are any doubts about the Paternity Test, <a href="http://www.paternity-testing-germany.com/" rel="nofollow">DNA Relationship Test</a> and Identity Proofs. Unlike the mother, as a general rule, the father is naturally often left with his suspicions unless he decides to take a paternity test.<br />Herry Johnsonhttps://www.blogger.com/profile/06336899634205525690noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-35512034913513058422015-07-05T21:21:24.101-04:002015-07-05T21:21:24.101-04:00I was wondering if my half brothers cousin is rela...I was wondering if my half brothers cousin is related to meCory Hardinghttps://www.blogger.com/profile/02863831921615493930noreply@blogger.comtag:blogger.com,1999:blog-1078247547416795390.post-33504400483325661432015-07-05T21:20:43.192-04:002015-07-05T21:20:43.192-04:00I was wondering if my half brothers cousin is rela...I was wondering if my half brothers cousin is related to meCory Hardinghttps://www.blogger.com/profile/02863831921615493930noreply@blogger.com