Inova Blood Donor

For the 17 years of my life, I was told my blood type is A. For my school, the service Inova Blood Donor came and I decided to donate my blood. A month later, I received a confirmation letter and a letter of thanks from the function of blood donation. On paper, they have added a card with my ID, including my blood type. On paper, he said that my blood type is AB blood. I asked my parents, they said they could be wrong. Then I called the Department of donors. The lady explained to me how this is a rare and explain how it happend, but I do not remember. Can someone explain to me how this happen?

There is a way this can happen!

To simplify this:
You are type AB.
Your mother is type A.
Your father is type O.

simple genetic: No, not possible. The most likely explanation: The customer service, he was mistaken, and the real father has type B or AB blood group.

simple human error: You have recently given blood, if you are confirmed AB, * * and you know your blood type. How certain are you of your parents?

Complex human error: blood typing services are generally correct, because when they screw up, someone could die. However, they may end up being wrong. It is a very rare opportunity, but it could happen.

complex genetics: Your father has the Bombay phenotype. This makes him appear as "O" on a normal blood test, but he could not bear the "A" or "B" genes. It is a very rare disease, and does not cause him any questions unless he receives a blood transfusion.

genetic explanation:

Everyone has two copies of the ABO "gene". A and B are codominant on O. This means that someone who has "AA" or "AO", genetically, is type A blood. "BB" and "BO" make B. "AB" does genetically AB blood group. "OO" genetically fact that the blood group O.

Each parent gives one of their copies to the child. Here are some examples of how blood types can be mixed:

For your parents (your mother could be AA, so in this case, all her children would end up as AO type A in the blood):
Mom: AO (A Dad): OO (O)
Children: AMOM Odad AO (A), Omom Odad (O)

Another random match-ups:
Mom: AB (AB) Dad: OO (O)
Children: Odad AMOM (A), Odad Bmom (B)

The "B" gene must come from somewhere for yourself. Your father did not have it, your mother did not. The most likely explanation? Your father is not really your father, and someone type B (or type AB) blood is really your father.

However, there is another possibility: the Bombay phenotype. Your father would be one who has it, and it will look like he only genes OO (blood group O) but it might actually be genes A or B.

How it works:

There is another protein that nobody thinks called "h". Almost everyone has it. The "h" protein is produced by the "h" of genes. The "A" gene contains instructions on how to activate the "H" protein "A" protein. Similarly, the "B" of the gene contains instructions on how to activate the "H" protein in a "B" proteins.

So what happens if you miss the "h" genes? You may get instructions on how to turn the "h" proteins in a 'B' proteins, but they would do nothing. You would not appear to have type B blood, you want to appear to have blood type O.

You may think of it as trying to make a sandwich. The "h" of genes that give instructions on the basics of sandwich: Take two slices of bread, put something between the two, the results yumminess. The "B" gene provides information on how to.