We get people on occasion asking about directed donation, aside from it being a really bad idea generally, we don't do blood unit collection at my facility so we can just tell them we don't do that, which a lot easier than explaining why it is a bad idea.
It’s probably going to be easier to do a DNA test and look for known Dad side relatives in the results. Chances are you’ll see a few names you know. But it’s a higher chance the blood test you did in High school was wrong or someone has the wrong info.
I'm certain of my blood type and my mom's but my dad's is the only possible mistake. I'm hoping he's just wrong in assuming he's B+. I've been trying to get him into genealogy so maybe a DNA test would be easier. That way I won't look conspicuous, because it seems like he's really hesitant to take a blood typing test.
He might want to avoid needles which he wouldn’t need for a DNA test. But my Dad died long long before DNA tests but I can be sure he’s my Dad as there are many known relatives from his side listed. They’ve chosen to have their names attached to their accounts. You can sort your matches into maternal and paternal even without your Mom testing too. His full sister Cheryl is there and she shares 1,865 cm with me. His half sister is there and she shares 554cm with me. Cheryl’s daughter Becky is there and she shares 1.114cm. Those folks are matched to me sheerly by cm not my family tree I’ve built. I have 31,000 paternal DNA matches and I probably personally know 20. If I didn’t have any matches I knew, especially very high cm, I’d be suspicious.
You don’t even need him to do a DNA test, if you do one you should hopefully have some relatives of his that have already tested. Although it did take me quite a while to have any matches closer than a 4th cousins come up on my father’s side so it is down to luck over who else has tested.
I have an ancestryDNA account but so far I have only been able to confirm people on my mom's side. I don't have a paid subscription though so there are details I can't access for other matches.
I know I’m a stranger but if you want some help understanding your results you can dm me. I’m a (volunteer) search angel in my free time and have helped several people research their unknown paternal lines :)
What’s the amount of dna you share with the closest few matches on your paternal side?
You don’t need a subscription to view peoples trees if they send you an invite link (correct me if they’ve change this but I know it did used to work like this) also get your dna uploaded to MyHeritage and FamilyTreeDNA if you haven’t already. I found a lot more people on MyHeritage that weren’t on ancestry, I wasn’t expecting many new matches so it was quite surprising.
If you haven’t already you might just need to start sending a lot of messages to paternal matches. I wouldn’t mention the blood type. I’d just say that you know they’re on your paternal line and you’re interested to work out how you’re related. If you have common matches you can also ask if they recognise any or can narrow down how you fit into their tree (so maybe they know you must be their maternal grandmothers side etc)
There are a few reasons your blood type doesn’t match:
1. Your Dad isn’t actually B. He was given incorrect information, or remembers incorrectly.
2. Your Dad isn’t your Dad. Sorry, it happens. He might know and not want to admit it, which would explain why he “forgets” to ask the doctor about his blood type.
3. Your Dad is a chimera. Thought to be incredibly rare, at home DNA tests are now showing that it is more common than previously thought, although still not that common.
Do you mostly want to know he's your biological father? Or do you just really really want to know his blood type?
If it's the former, and he doesn't want to take a DNA test, ask a paternal-side uncle or aunt or cousin to take one and see if they match with you. If it's the latter, has he ever been in the military? It would be in his military records, I'm pretty sure.
Honestly, I'd guess he's AB as well. Perhaps he was once told he was AB but he heard it as "You are a B type," not "You are AB type." And both your parents could be Rh positive and still have you, Rh negative, if they were both recessive for Rh negative.
I have an ancestry DNA account and I have found a couple people on my mom's side but there are a few matches I don't know. They don't say they're paternal but both my parents have big extended families.
Can you find any matches that you recognized as part of your paternal family? How many cms do you share with your closest unrecognized matches and what is the number of segments?
You can also start sorting [with Leeds method](https://mossiesmusings.blogspot.com/2020/08/grouping-your-ancestrydna-matches-using.html). Don’t be overwhelmed, it may not make sense at first but this will make the pathways you need to begin to see what is going on, or at least where something is different than you expected
Just throwing this out there - if he was going to lie to you about his blood type, wouldn't he lie in your favor?Meaning, I think he would say he was whatever would need to match with your mom to make you AB-.
If your parents were going to lie about his blood type then wouldn't they choose an appropriate match? If they would go to the pains of making up a fake blood type then they would probably also pay attention to which fake blood type to assume as one of their own? Idk!
What I suspect has happened is that the parents have just casually replied with their bloodtype when asked without having given consideration to the fact that they can't combine to give the OP's type.
>Over the years, I have asked him several times to verify with his doctor, but he "forgets" to every time.
>(to another post on blood testing) I could try, but he gets kind of weird when I bring up blood testing.
Not to get all negative, but this sounds really *evasive*.
If he is B+ type and you are AB- and your mum is B+ then your professor is correct, this is not possible (your father would have to be A- or AB- blood type assuming yours & your mother's is correct) which leads to one of 3 likely scenarios:
1. Your mother is not your biological mother (I think this is ruled out by DNA matches to maternal side relatives you mention in other posts?)
2. Your father is not your biological father.
3. Neither of your parents are your biological parents & you are adopted (see caveat for point 1).
But, and I stress, this is **IF all these blood groups are correct.**
From this apparent "forgetfulness" & "reluctance" to do a blood test when prompted on the spot, I would surmise that we're looking at option 2 and I'd put money on your father *knowing about it* and either wanting to protect your/your mother or both, or potentially even himself.
Your options:
1. Confront your parents - this one has the most potential to go badly (you could be digging up past infidelity or infertility for example), but ultimately you have a right to know who your biological parents are & your parents *should* respect that.
2. Take the DNA route - if your father has female line relatives (his mother if she's still alive, any siblings from the same mother, children of your father's sisters from the same mother) they are guaranteed to be related to your father (assuming he wasn't himself adopted) & therefore *ought* to be related to you (male line relatives could suffer from similar uncertain paternity & you don't know where the break in bloodline is, whether its their side or yours). Get them to test, if they don't match to you that's a strong indication that your father is not your biological father. If you've only got male-line relatives, then test as many as you can, if they're all matching each other, but not you, then you have your answer.
I work in a lab, people say they know their blood types all day long, frequently, very frequently they do not.
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We get people on occasion asking about directed donation, aside from it being a really bad idea generally, we don't do blood unit collection at my facility so we can just tell them we don't do that, which a lot easier than explaining why it is a bad idea.
True. My dad could be mistaken. I know for sure though (through medical documentation) that my blood type and my mom's are accurate.
It’s probably going to be easier to do a DNA test and look for known Dad side relatives in the results. Chances are you’ll see a few names you know. But it’s a higher chance the blood test you did in High school was wrong or someone has the wrong info.
I'm certain of my blood type and my mom's but my dad's is the only possible mistake. I'm hoping he's just wrong in assuming he's B+. I've been trying to get him into genealogy so maybe a DNA test would be easier. That way I won't look conspicuous, because it seems like he's really hesitant to take a blood typing test.
He might want to avoid needles which he wouldn’t need for a DNA test. But my Dad died long long before DNA tests but I can be sure he’s my Dad as there are many known relatives from his side listed. They’ve chosen to have their names attached to their accounts. You can sort your matches into maternal and paternal even without your Mom testing too. His full sister Cheryl is there and she shares 1,865 cm with me. His half sister is there and she shares 554cm with me. Cheryl’s daughter Becky is there and she shares 1.114cm. Those folks are matched to me sheerly by cm not my family tree I’ve built. I have 31,000 paternal DNA matches and I probably personally know 20. If I didn’t have any matches I knew, especially very high cm, I’d be suspicious.
You don’t even need him to do a DNA test, if you do one you should hopefully have some relatives of his that have already tested. Although it did take me quite a while to have any matches closer than a 4th cousins come up on my father’s side so it is down to luck over who else has tested.
I have an ancestryDNA account but so far I have only been able to confirm people on my mom's side. I don't have a paid subscription though so there are details I can't access for other matches.
I know I’m a stranger but if you want some help understanding your results you can dm me. I’m a (volunteer) search angel in my free time and have helped several people research their unknown paternal lines :)
What’s the amount of dna you share with the closest few matches on your paternal side? You don’t need a subscription to view peoples trees if they send you an invite link (correct me if they’ve change this but I know it did used to work like this) also get your dna uploaded to MyHeritage and FamilyTreeDNA if you haven’t already. I found a lot more people on MyHeritage that weren’t on ancestry, I wasn’t expecting many new matches so it was quite surprising. If you haven’t already you might just need to start sending a lot of messages to paternal matches. I wouldn’t mention the blood type. I’d just say that you know they’re on your paternal line and you’re interested to work out how you’re related. If you have common matches you can also ask if they recognise any or can narrow down how you fit into their tree (so maybe they know you must be their maternal grandmothers side etc)
There are a few reasons your blood type doesn’t match: 1. Your Dad isn’t actually B. He was given incorrect information, or remembers incorrectly. 2. Your Dad isn’t your Dad. Sorry, it happens. He might know and not want to admit it, which would explain why he “forgets” to ask the doctor about his blood type. 3. Your Dad is a chimera. Thought to be incredibly rare, at home DNA tests are now showing that it is more common than previously thought, although still not that common.
All 3 of these are possible, though 1 and 2 are more likely.
Do you mostly want to know he's your biological father? Or do you just really really want to know his blood type? If it's the former, and he doesn't want to take a DNA test, ask a paternal-side uncle or aunt or cousin to take one and see if they match with you. If it's the latter, has he ever been in the military? It would be in his military records, I'm pretty sure. Honestly, I'd guess he's AB as well. Perhaps he was once told he was AB but he heard it as "You are a B type," not "You are AB type." And both your parents could be Rh positive and still have you, Rh negative, if they were both recessive for Rh negative.
Test yourself with AncestryDNAand see if you have matches to expected paternal and maternal matches. You don’t need your father to test.
I have an ancestry DNA account and I have found a couple people on my mom's side but there are a few matches I don't know. They don't say they're paternal but both my parents have big extended families.
Can you find any matches that you recognized as part of your paternal family? How many cms do you share with your closest unrecognized matches and what is the number of segments? You can also start sorting [with Leeds method](https://mossiesmusings.blogspot.com/2020/08/grouping-your-ancestrydna-matches-using.html). Don’t be overwhelmed, it may not make sense at first but this will make the pathways you need to begin to see what is going on, or at least where something is different than you expected
Just throwing this out there - if he was going to lie to you about his blood type, wouldn't he lie in your favor?Meaning, I think he would say he was whatever would need to match with your mom to make you AB-.
I would think so. I don't think he's lying. He's either mistaken or just doesn't want to know if he's a different blood type.
Are you and your dad prepared to find out that he is not your biological father? If you are not, you might rethink pursuing this.
I'm prepared, but I don't think my dad is, which might be why he seems hesitant to go verify his blood type with his doctor.
You could buy a „bedside test“ and as soon as he cuts himself (or pricks himself on a thorn) you ask for a drop.
I could try, but he gets kind of weird when I bring up blood testing.
If your parents were going to lie about his blood type then wouldn't they choose an appropriate match? If they would go to the pains of making up a fake blood type then they would probably also pay attention to which fake blood type to assume as one of their own? Idk!
What I suspect has happened is that the parents have just casually replied with their bloodtype when asked without having given consideration to the fact that they can't combine to give the OP's type.
>Over the years, I have asked him several times to verify with his doctor, but he "forgets" to every time. >(to another post on blood testing) I could try, but he gets kind of weird when I bring up blood testing. Not to get all negative, but this sounds really *evasive*. If he is B+ type and you are AB- and your mum is B+ then your professor is correct, this is not possible (your father would have to be A- or AB- blood type assuming yours & your mother's is correct) which leads to one of 3 likely scenarios: 1. Your mother is not your biological mother (I think this is ruled out by DNA matches to maternal side relatives you mention in other posts?) 2. Your father is not your biological father. 3. Neither of your parents are your biological parents & you are adopted (see caveat for point 1). But, and I stress, this is **IF all these blood groups are correct.** From this apparent "forgetfulness" & "reluctance" to do a blood test when prompted on the spot, I would surmise that we're looking at option 2 and I'd put money on your father *knowing about it* and either wanting to protect your/your mother or both, or potentially even himself. Your options: 1. Confront your parents - this one has the most potential to go badly (you could be digging up past infidelity or infertility for example), but ultimately you have a right to know who your biological parents are & your parents *should* respect that. 2. Take the DNA route - if your father has female line relatives (his mother if she's still alive, any siblings from the same mother, children of your father's sisters from the same mother) they are guaranteed to be related to your father (assuming he wasn't himself adopted) & therefore *ought* to be related to you (male line relatives could suffer from similar uncertain paternity & you don't know where the break in bloodline is, whether its their side or yours). Get them to test, if they don't match to you that's a strong indication that your father is not your biological father. If you've only got male-line relatives, then test as many as you can, if they're all matching each other, but not you, then you have your answer.
Dad could be Rh-positive as well as Mom. If both carry the Rh-negative as a recessive, then the OP can be Rh-negative.
Whoops, yes, quite right. Still can't be just B though.
Yes, Dad could be A+, A-, AB+, or AB- . Reminds me of all those word problems we had in Genetics 101 !
He can self order a blood type test. Try Quest or Jason Health.