Genealogy Chat

Mine is AB. Can I have a father with O blood group?

No, You only get one letter from each parent and Os don't register, so you get an A from one parent who must be A or AB, and B from the other who must be B or AB. (The A parent is really AA or AO, and the B parent is really BB or BO. An O parent is really OO.)

Well that opens up a can of worms then! That's what comes of tracing your family ! I was adopted and have got this info from my dad's military records. Now I'll have to check that mine has been recorded correctly when i had my children. He was mentioned on my adoption records and has never denied it.HELP!!

This may help

http://www.thetech.org/genetics/ask.php?id=115

Like mgnv said, you can only be group A if one of your parents has passed on the A.

Does anyone know what an AB parent passes on?

if your blood group is AB then your dad must be AB,B he cant be O, think thats right. im rh o neg,my husband is AB,two of our chilren are AB and two are A.......x

sarah, if both parents are O, then the child has to be O .x

Thank you for the useful information, I've often wondered how it was worked out.

Milly

My computer picked today to decide not to work and I've only just got back online ! Lots to think about and I really don't know how to proceed from here. I can't exactly ask my mum in Oz who else she slept with 58 years ago !!

Shannette, it does not happen often, but mistake in recording blood groups does happen.

I'm praying you're right Mary .I'll check with my dr asap.I can't imagine that the US military would make a mistake.

Typical! I know my blood group (A+) and I know my Mum's (A+) so that means my Dad was A AB B or O
Thank goodness I know who he was but it would have been nice to know his group. (I even know when I was conceived!)

Devil's in the detail!

The rhesus factor, i.e., the RH +/- thing, works pretty much the same. The kid gets a sign from each parent, and if you wind up with ++ or +-, you're called Rh + and if you wind up with - - you're called Rh -. So if both your parents are Rh -, then you will be Rh - too. If at least one of your parents are Rh +, then you could be anything.

Well I'm no further forward at the moment. I went to my GP who pointed me in the direction of medical records at my local hospital and i then spent ages being transferred here and there before being told to write in for confirmation. The only thing is that everyone thinks it must be right if it's on my maternity notes.Need to get back to US military now I think.

I've finally had my blood group confirmed in writing and I am AB rhesus positive so where do Igo from here? My only thought is that I need to find out if my father was in deed in this country 9 months before I was born or still in the States.

hi i dont know very much about blood groups but im AB+ and may daughter is too and her father is O+
so how does that work
would love to know
regards toni

The link posted by Claire in Wales explains that someone testing as O, i.e. no A proteins and no B proteins, might in fact be genetically A or B, but not making A or B proteins (or not enough of them) to be picked up by the blood test.

This might be the case for Shannette's dad or Toni's partner.

I recently caught a repeat of an old episode of the Jeremy Kyle Show which covered a similar story. A can of worms had been opened by a young lady having her blood tested and getting an AB result as the medical records of both of her parents recorded their blood types as O. The show checked the situation out and it was made clear that is genetically impossible for two people with blood type O to produce a child with type AB. The young lady and her parents all took a DNA test to determine which if either of them was her parent and which was not. After an anxious wait and going through possible scenarios that the mother had had an affair which she strongly denied or that there had been a mix up at the hospital when the young lady was born it transpired that both people were indeed her parents. How could that be? It turned out to be a simple mistake in the fathers medical records when he was young where the totally wrong blood type had been recorded. This only came to light because the show had them all take a blood test and it showed the fathers blood type to be AB.

Is there any way you could confirm your fathers blood type other than from records?

Caz

Another alternative for Toni's daughter and Shannette are that they were conceived as a twin.

Suppose an AB mother gives one twin an A and the other a B, and each receives an O from Dad. Blood sharing in the womb might mean that the surviving twin, despite being genetically A or B, has both A and B proteins circulating (and this can continue throughout life if blood stem cells that were exchanged).

How fascinating all this is ! My supposed dad died in 2001 and we never met. I've written to Burtonwood air base where he was when he met my mum to check that he was in this country when I was conceived.From my adoption file there's no mention of my being a twin and no one has ever said I was. This is getting urgent as I'm 58 my mum's 77 and any possible dad could be quite old now if alive. Luckily my siblings on my dad's side will still be related to me as he married my aunt instead of my mum!! I really should write a book !