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Blood types

Is it possible for the mother of a child to have B+ blood type, Father to have A+, and the child to have O+ ?   Thank You for your help!
71 Responses
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No.  Generally the child should have AB+.
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Does the gene depend on blood types? Let's say a child has a blood type A so does his your father, but his mother is O.
Does that mean that the gene that the child has are mostly inherited from his father? Thank you.

Cutious
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I will answer this question for you. Yes, it is possible to have the situation you describe. Type O is recessive,so for a person to be that type he/she had to inhert "O" from both parents. Although the mother types as B, her "genotype" is really  BB or BO but since B is dominant that is what shows up in the blood type test. The type A father would be AA or AO. (A, like B, being dominant over O) In the scenario you describe, for the child to be type O (really OO)the mother had to be BO, the father AO, and the child inherited an O from each parent. A and B are not dominant over each other, so if the child inherited the A from one parent and the B from the other, the child's type would be AB.  The + and -, which is the RH type, is inherited independently from the ABO blood types.  The above parents could have had an O- child as well (as well as B+ or B-, A+ or A-,AB+ or AB -)This is a simple explanation, hope it helps.

Chris S.
Avatar universal
Hi Jack:

The doctor is right in that statistically the least likely blood type for a child in the situation you describe is type O.  There would be a greater chance for the baby to be A, B, or AB, but a type O child is definitely *possible*. The same is true for the RH type (+ or -) Statistically, an RH neg child would be least likely, but still possible.  A better prediction could be made if the blood type of the parents and siblings of each parent in this situation were known.

Chris S.
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thanks for your comments.
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Hi I would like to ask two questions.Is it possible for two positive blood type parents to have a negitive blood type child?
for instance the mother is A+ and the father is B+ and the child is AB- ? The next question is there any way that a person with positive blood can change it to a neg type blood ?
Avatar universal
Hi I would like to ask two questions.Is it possible for two positive blood type parents to have a negitive blood type child?
for instance the mother is A+ and the father is B+ and the child is AB- ? The next question is there any way that a person with positive blood can change it to a neg type blood ?
Avatar universal
Hi I would like to ask two questions.Is it possible for two positive blood type parents to have a negitive blood type child?
for instance the mother is A+ and the father is B+ and the child is AB- ? The next question is there any way that a person with positive blood can change it to a neg type blood ?
Avatar universal
Hi Is it possible for two positive blood type parents to have a negitive blood type child?
for instance the mother is A+ and the father is B+ and the child is AB- ? The next question is there any way that a person with positive blood can change it to a neg type blood ?
Avatar universal
Is it possible for a child to be born with 0- if the mother is B- and the father is 0+ ?
Avatar universal
yes, it is possible for a child to have O typing when the parents are A and B...as menitioned in previous responses, the genotypes of the parents could be AO and BO thus lending to a child who's phenotype is due to OO genetic coding.
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If my bloodtype is AB+ And My son's father's O+, then what would be our son's bloodtype?Question


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I'm pregnant & my blood group id AB Rhesus D positive

Is this considered good or bad.
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I'm doing reserch on blood types and I wold like to know if it is possible to have a person with a O+ blood type and another person with a B+ blood type and they be related, eg: brother, sister.
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I am an aFroAmerican-with A- blood trying to eat for my blood type. what reigon of the world has an abudance of this blood type?
thanks ,
Jafar
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Is it possible for 2 people with type O+ to have a child who is A+? Thank you.
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If the mother was B+ and the father was B-, could the child ever end up being AB+?
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If I am type A + , and my hsband is  O - . what are the possible results for my unborn child??
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I am looking for my blood type.  I had a test done a few years ago.  I was born at Kapiolani Medical Center for Women and Children.  The test was also done there.  Can you give me a website, please?
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I want to know what is blue blood cause I got it and want to know what that actually is.
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How do positive and negative blood types affect having children?

I am 0+ if I were to have a child with someone who is 0- would there be any danger? Or anything to be concerned about?

Avatar universal
The question posted by Jack on Dec 99 I believe was incorrectly answered.  IF the mother is B and the child is O, then the father cn be O,A,or B but not AB.  Therefore the father can be A.  IF you look at the answer down further posted by Chris, it futher varifies this.  Say the mother is BO and the father is AO, then the child can be O.
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If the mother and father of a child are both AB+, It would stand to reason that the child would be AB+ right? My childs father is claiming that he is not her father, all three of us are AB+.I know that the only sure way to find out is DNA testing.
Avatar universal
I heard on a TV show   the other day, that Type o parent should not have children if the mother has Type AB blood type ????  Is that true--- I have type AB+ blood n the father has/had type O?
   I have 2 children-- they both have type AB+ blood type. I am confused???? n startled now, by that????
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