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What Determines A Child's Blood Group?
Question: My Dad is O+ and my Mum is A2B+ but my blood type is B-. How is this possible?
Brief Answer:
an AB and O parent produce a child that is either A or B
Detailed Answer:
HI, thanks for using healthcare magic
First looking at the positive (+, rhesus +) and negative (-, rhesus negative): (1) two parents with positive can have a child with a negative.
Positive or negative is determined by the presence of two RH settings/genotypes in the body.
Meaning: if both genotypes/setting for RH are negative (- -) then they would be rhesus negative,
If both settings/genotypes for rh are positive (++), then they would be rhesus positive
If one setting is positive and one is negative (+ -) , then they would Still be considered or found to be rhesus positive
This is important, it means that though both of your parents could have the setting (+ -), when this is combined , they can have a child that gets the negative from both of them- a rhesus negative child
As for the blood type, an AB parent and O parent would have a child that is either blood type A or B, so your blood type of B is completely normal.
I hope this helps, feel free to ask any other questions
an AB and O parent produce a child that is either A or B
Detailed Answer:
HI, thanks for using healthcare magic
First looking at the positive (+, rhesus +) and negative (-, rhesus negative): (1) two parents with positive can have a child with a negative.
Positive or negative is determined by the presence of two RH settings/genotypes in the body.
Meaning: if both genotypes/setting for RH are negative (- -) then they would be rhesus negative,
If both settings/genotypes for rh are positive (++), then they would be rhesus positive
If one setting is positive and one is negative (+ -) , then they would Still be considered or found to be rhesus positive
This is important, it means that though both of your parents could have the setting (+ -), when this is combined , they can have a child that gets the negative from both of them- a rhesus negative child
As for the blood type, an AB parent and O parent would have a child that is either blood type A or B, so your blood type of B is completely normal.
I hope this helps, feel free to ask any other questions
Note: Do you have more questions on diagnosis or treatment of blood disorders? Ask An Expert/ Specialist Now
Above answer was peer-reviewed by :
Dr. Chakravarthy Mazumdar
Answered by
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