Genealogy Chat

Wow this gets really complicated doesn't it? I don't know what blood group any of my siblings are and don't want to ask my mum really as it may make her suspicious of my motives. I'm in a very delicate situation as other adopted people will understand.

I agree. All the sites I have looked at say the same. An AB can't have any parent who is O.

If one parent is O then a child will be

O or A if the other parent is A,
O or B if the other parent is B
A or B if the other parent is AB
O if the other parent is O. .

for a child to be AB then parents must be:-

A + B or AB
B + A or AB
AB + AB or A or B

Just saw Heather's. That doesn't make sense either.

Rose

Well. pretty sure! See Heather's posting too. I do see what you mean though.
My group is definite, must check hers with Mum again! (I always knew we were different...)
Jan

Brummiejan,

That can't be correct. Are you sure? For you to be AB your mother would have to be A, B or AB.

http://www.bloodbook.com/inherited.html

http://www.canadiancrc.com/Paternity_determination_blood_type.aspx

Rose

Inspectorgreenpen, this is not true:

"And yes, for a child to be AB, one parent must have A and the other B, somewhere in their blood type. If one parent is AB then the other can be anything EXCEPT O"

My mother is blood group O and I'm AB.

Incidentally, we are an exclusive bunch - around 3% of the population, so not sure we should be talking to you common lot ... !!!

I'm an O+ and my husband is a AB-. My oldest daughter is O+ and the youngest is AB-.

Shannette,

You wrote: "Luckily my siblings on my dad's side will still be related to me as he married my aunt instead of my mum!! "

Do you know any of their blood types?

Rose

This site has a 'ready reckoner' which will work out the possible permutations

http://www.biology.arizona.edu/Human_Bio/problem_sets/blood_types/inherited.html

And yes, for a child to be AB, one parent must have A and the other B, somewhere in their blood type. If one parent is AB then the other can be anything EXCEPT O

Did anyone watch BBC drama last night --5 days ? --they said that a father with blood group O couldn't be related to a baby with blood group AB ! I'm off again worrying !!

Thanks Sylvia
Much appreciated.

Thanks everyone for your input. I'd never imagined there would be so much interest in this or how complicated it all is.I was so down when i first thought that the man they'd told me was my dad wasn't my dad and now perhaps he was after all.Do you sometimes think that this hobby throws up things we'd be better off not knowing ?

Why don't you take a look at my employer's website I'm sure if you require more information they will be pleased to help you here is the link:http://www.blood.co.uk/pages/e13basic.html

nudge

nudge

What a good job I didn't have a knee jerk reaction to this and perhaps spoil the relationship I've spent years building with my mum! It doesn't appear to be as cut and dried as first thought.

Nightowl

your blood group will actually be BO, and the B dominates


similarly your father must have been Rh+, and that dominates in you.


Rh+ father and Rh- mother is what used to result in very serious problems during pregnancy because the baby sends Rh- into the mother's bloodstream and she sends Rh- into the baby ..... the problem gets worse with successive pregnancies, and great care is usually taken with such mothers.


sylvia

I found this thread fascinating.
My mother was AB Rh Neg and my father was 0.apparently
I ended up B pos.
NOt sure how that worked but I am now very interested to find out what my 2 sons are.
You very rarely find out what blood groups males are unless they have an illness that requires a blood test.

I'm AB+ too and my husband is O+

I think both of my daughters are B but one of them could easily have been an A so we could have ended up with everyone in the family having a different blood group.

My daughters are both blood donors and one of them is a borderline positive/negative which we found a bit strange but a doctor said to her that there are a range of results. It seems it isn't a yes or no situation exactly.

My kids have both got to have one O and one B with B being the one that shows. They could pass on either B or O to any children so my future grandchildren might end up with quite a range of groups.

It's an interesting subject.

Sue

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 !