Is it possible for 2 parents with Blood type O to produce children with Blood type A?

Answer 1

YES it can, I AM proof of this, If a parent has a RECESSIVE gene, it can happen. Both my parents are O and my sister is O and here I am.. an "A" blood type! I did some research and of course the internet says "NOPE... your mom screwed around". I say BULL CRAP! I called the American Red Cross and they did some testing and found out that I am a RARE person with RARE blood typing. I am known as that OA blood where A shows up in tests as my blood type and O is the recessive gene for me. My sister could marry a man (having O as well as her) and end up with an A child.

So to all those out there than say "NO" it can' GUESS AGAIN!!! It can and HAS!

Another answer

My son is also proof of this anomaly! My husband and I are both type-0 and our son is type A.

Side note: Type-0 is actually not the letter "O" but a zero for lack of a functional protein, therefore it does not contain the antigens that would precipitate an immune reaction to foreign antigens.

Another answer

Since I am a blood type of O positive and my son is A positive, I wanted to know my daughters blood type in case something bad happened to get to the e.r. She is blood type A positive too. My son's father was A positive and died. My daughter's father is O positive like me. We are still together. I was surprised to hear she was A positive as well. The head nurse told me that though it is rare, it can happen since my father was A positive it can skip a generation. She also inherited my father's blue eyes. Everyone else has green. Believe what you may. Find out the truth yourself.

Another answer

Yes. My son is 0- and my daughter in law is 0+ and they just had a A+ baby boy. It is very rare but the doctor said it can happen because every has a primary and secondary (recessive) blood gene. Since my d-i-law's father is A+ and her mother is 0+ and his parents are both 0+ but his mothers mother is A+ and her Father is 0+ there are many recessive A+ genes in their DNA blood type therefore they can have a A+ child. (Example mother is O+/A+ and father is 0-/A+ equals= A+/0 child.) 0 seems to be universal and can throw off a recessive gene. In our case; since it is rare; the baby and the mother's blood types caused him to have alot of jaundice (18) so he had to go back in hospital to be under the light for an additional 24 hours to bring it down. She was nursing and her milk had not come in to give him the fluids to fight off the excess billiruben count. Other than that; it will not be a problem for either of them.

Answer 2

My cousin uses to work for the Blood Transfusion Service and I was asking about this some time ago - the answer is no. :))

I'm not sure if this is the proper way to add my answer, but here it is:

My husband and I have five children; I am A- and he is A+. Our first two children were A+ like my husband, but our last three have been O+. I don't know how it happens, but I now know it can! (Yes, I get teased about the mail man!)

Answer 3

It is possible if both the parents are heterozygous for the A blood type. Each person has two genes that determine blood type A,B,i. The A and B alleles are dominant. This means if both parents had an A allele and an i allele the child could have the type O blood type. It would be about a 25% chance of this happening.

Answer 4

No, it is not possible that two O parent can produce a A type child. The O blood group is the expression of a recessive phenotype and this is only possible when the recessive genes are present in homozygous conditions. So, both the parents will be IOIO type genetically. The only kind of gamete produced by them would be IO and the union of this gamete will always give IOIO genotype that is a O blood group child.

Answer 5

Yes, if their genotype is AO and AO and they both transfer their O genes then the child ends up with O blood type.

Answer 6

Can parents with "O" blood have one child with "O" blood and one child with "A positive" blood?

Answer 7

Possible I'd say if there's A (pos) type in one of your families but I'm not a doctor.

Answer 8

Yes, but only if both parents have the allele for blood group O. If that is the case then there is a 25% chance of their offspring with blood group O.