I’m AB-, which is almost as cool as being a “cured” left handed ex-Catholic.
(That means the nuns would not abide a six year-old lefty.)
Peace,
mangeorge
Re’ the passing on of blood type within families, I assume both my kids are O- since their dad and I both were/are. When it was confirmed I was pregnant with my son and O-, they got the father in there and tested his blood and it turned out he was as well. As I understand it, two O- parents can’t produce a child with any other type of blood, but I could be wrong. Or am I right?
My mother had RH neg. When someone with that blood type got sick, she got a phone call to donate. Neither my brother or i have it. We are 0s.
According to the chart on this website, any other combination can produce a positive or a negative, but two negatives can only produce a negative. My husband and I are both A+. Our son is A+. Our daughter is A-.
If Dad’s AB, and both kids are AB, then the only thing Mom can’t be is an O.
Each parent contributes one allele, so Dad’s giving you an A or a B. Let’s say both you and your sibling both lucked out and got B alleles from Dad - if Mom’s type is A, you can get the A part from her and combined you’ll type as AB.
Two Oneg parents will always produce Oneg offspring, barring any weird mutations or subtypes or anything like that.
This website deals with blood type inheritance fairly well.
O- but can’t donate. 
A+
But, alas, another who can no longer donate (darn blood thinners:( )
I’ve wondered, does a low dose regimen count in this regard?
Okay, I think I understand. There are, in fact, four of us kids, all with AB+.
Let me see if I have this right in my head. This suggests not random possibility of an A from one parent and a B from another, or vice versa, but a very high probability that both parents are AB and both parents are +. Therefore Inigo Montoya is likely correct in his assumption.
Does that seem right?
I’m A-, but I carry the antibodies for both Hep B and Hep C (with zero viral load).
I’m immune to both Hep B & C, but they don’t want my blood because I had hepatitis.
Seems like they’d be dying to get ahold of a pint o’ Rysdad.
Oh well.
I’m immune to bee sting. Well, I was. Is immunity lifelong?
Another AB+ here… I’ll have a pint of your best, barman! 
Actually no… if I’ve got the ABO Rh+/- sorted out right in my head. (And assuming no blood type weirdness)…
+/- first: if your Mother has Rhesus negative (dd) then providing your Father’s positive is homozygous (DD, rather than the heterozygous Dd) all of you kids will have Rhesus positive (Dd). (Or your Mother is positive). If both your parents have heterozygous Dd positives then with 4 kids it would be nice to see a Mendelian 3:1 punnet square – one of you would be negative – but real world statistics don’t work that way.
With the ABO: we can know that your Mother isn’t type O (or AB wouldn’t be an option for the kids), but… and I’ll freely admit my maths is pretty sucky… there seems to be the same chance of her being AB as being A or B.
Assume for a moment that your Mother has AB too – then for the four of you children to get AB whichever allele you got from your Mother (A or B) you must have got the opposite from your Father, otherwise one or more of your would have A or B type. On the other hand, if your Mother has homozygous AA or BB type then you’d have always got the same from her, and you’d have to have got the opposite from your Father (4 times in a row)… I think these are the statistically the same. 1 in 16 chance?
The one outlier is your Mother having heterozygous AO or BO, because there you and your siblings would have to have got the non-O allele four times and the opposite one from your Father. 1 in 256?
Whatever happened to type K? I think that was it.
A+ recently made a donation after a year (to the hour!) of being rejected for illness and injury. It felt good to be back in the saddle.
A+, just like everything else about me.
Okay, I’ll ask. Are (some) people kinda proud of their blood type? I’ve heard a few apologize for being type O.
Just wondering.
And just what would someone with a silly name like “Antigen” know about it?
Yeah…I misread the little gene chart in my head. I just *really *wanted to say something about **GuanoLad **'s mom. 
Another O- that gets stalked by the blood bank. I just got a new “Club O” card from the Oklahoma Blood Institute that I’m supposed to carry on my keychain for no apparent reason. They do give us O negs extra points for donating that we can use on their online store so at least I’ve got that going for me.
Here’s how the typical phone call goes:
OBI: Hello, this is Carol from the Oklahoma Blood Institute. Can you come in and donate today?
Me: Uh, today isn’t good for me.
OBI: But it’s for a baaaaaaaabbbyyyyyyy.
Me: OK, I guess, since it’s for a baaaaaaaaaabbbyyyyyyyyy.
It’s always for a baby.
Well, knowing that we have the rarest blood type … the population of those answering polls on blood types always seem to have an over-representation of AB- !