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Doctor insights on: Can Children Have Different Blood Types Than Parents

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If both parents have b+ blood type, can their child have a different blood group? And if the parents have 2 children, can only one child differ?

If both parents have b+ blood type, can their child have a different blood group? And if the parents have 2 children, can only one child differ?

Yes to both: If both parents are B+, any of their children can be either B+ or O+. Blood type is determined by the presence of either an A or B antigen, regardless of amount., with inheritance from both parents. B+ parents can be either BB or OB, . If both parents are OB, the child can be B+ (inherit a B from either parent) or be O (inherit an O from either) ...Read more

Dr. Janice Alexander
90 Doctors shared insights

Blood Type (Definition)

Refers to the proteins present or not present on the surface of red blood cells. The types are a, ...Read more


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How can a baby be born with a different blood type than the parents?

How can a baby be born with a different blood type than the parents?

Happens all the time: That's normal and happens all the time. Some combinations are not possible, such as 2 a biological parents having a b baby. ...Read more

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My blood type is completely different from my parents. How is this possible?

My blood type is completely different from my parents. How is this possible?

Need to know: Blood types of all parties. You parents may be blood group a and b and you may be o and that would be normal. Please resubmit your question with blood types of your parents and yours. ...Read more

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My blood type is completely different from my parents. How is this possible? My parents blood type is o+ mine is b+?

My blood type is completely different from my parents. How is this possible? My parents blood type is o+ mine is b+?

Genetics: Ordinarily, two parents both with blood type o cannot have a child with blood type b. There are a few rare ABO alleles, there is the possibility of a lab error, and there is also the possibility that one or both are not your biological parents. Ask each parent separately if you truly want to know and perhaps have trouble -- but decide first whether it's worth it. ...Read more

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Why is my blood type different than my parents' body types?

Why is my blood type different than my parents' body types?

Blood type.: They should match up unless you are adopted or one of your parents is not really our parents. But discuss with your Dr. For details. ...Read more

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Can a child have different blood type than their parents, if one has A+ and O-?

Can a child have different blood type than their parents, if one has A+ and O-?

Blood type: Your child should be either A or O. Not B or AB. They could be either positive or negative however. ...Read more

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My husband and I both have a positive blood one of our children also has a positive the other o, how can that be? I don't know what our parents blood type.

My husband and I both have a positive blood one of our children also has a positive the other o, how can that be? I don't know what our parents blood type.

A+: A+ blood type means that one of the 2 blood type chromosomes (one from father and one from mother) carries a and the other carries either a or o: a+ blood = aa or ao. For one of your children to be a and the other 0, each of you must have one chromosome as a and the other as o (from your parents). Since each of you is ao, each child gets either an a or an o chromosome from one of you, so each child could be either aa, ao, or oo. Aa and ao = a blood type; oo = o blood type. ...Read more

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Can two parents with o positive blood type make an a positive child? I've heard different answers

Can two parents with o positive blood type make an a positive child? I've heard different answers

Using: Using the ABO blood typing system- two parents with type o blood would have a baby with type o blood. The baby may or maynot be rh positive. ...Read more

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If iam o - what are my parents blood types?

If iam o - what are my parents blood types?

O, A or B: Each parent could be o, a or b. The only thing for certain is that neither one is type ab. ...Read more

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Is there a way to find out your baby's blood type without tests if you know both parents blood types?

Is there a way to find out your baby's blood type without tests if you know both parents blood types?

No: You can narrow down what the blood type of the child will be however you cannot be 100% sure what the blood type of the child is without testing since either the mother or the father can donate the gene for blood type. ...Read more

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What happens if two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotypes?

What happens if two parents who's blood types are both b produce a child that has blood type o, what can you say about the parent's genotypes?

Homework problem: Probably both parents have one copy of the B allele and one copy of the O allele. There are other exceptional situations -- each parent may carry Bombay, which when inherited from each parent masks B. And there are some weak alleles. Enjoy your studies. ...Read more

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What happens if two parent with o positive blood types have a child with b negative blood type?

What happens if two parent with o positive blood types have a child with b negative blood type?

Not possible: It is possible for the child to be rH negative if both parents are hybrid rH positive (one positive and one negative rH gene), but if they are both type O can only have type O children. Either one of them is not the biologic parent, or someone's blood typing is a mistake. Someone had to give that B gene. ...Read more

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Could you tell me if my mom is o positive what are her parents possible blood types?

Blood typing: The 4 major blood groups are a, b, ab and o. If your mother is group o, than neither of her parents could be type ab. The others would be possible. Likewise, being rh positive means that at least one of your mother's parents were rh positive, but not necessarily both. ...Read more

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Is there a such thing as C blood type? Is it possible for parents with B and O blood child to be C blood type?

Is there a such thing as C blood type? Is it possible for parents with B and O blood child to be C blood type?

Hemoglobin C: The main blood TYPES are A, B, AB and O. Perhaps you are referring to an abnormal hemoglobin type (Hemoglobin C) which can be detected on newborn screening results. Hemoglobin C is a structural variant of normal Hemoglobin A which may be of no clinical significance, or cause anemia and enlarged spleen. ...Read more

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Is it possible parents with B and O blood type to produce a child with C or O blood type?

Is it possible parents with B and O blood type to produce a child with C or O blood type?

Blood group: If parents have B and O blood group, the child can have either B or O blood group. There is no C blood group.
Blood groups can be A, B, O or AB. ...Read more