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Trove882

Trove882

Brain (2,222)

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Submitted 309 days ago...

Velban919

Velban919

New User (1)

Baby blood type

What are the chances of a baby being born with type O blood if both parents are they A and B? wouldn't one of the parents have to be an O for the baby to be an O?

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Answer 1 / 1 - Submitted 308 days ago...

Trove882

Trove882

Brain (2,222)

Blood type is a result of the gene carried on both sets of DNA in the chromosome. Since the A and B mean that the red blood cells carry an antigen (A or B) and O mean no antigen, to be type O you would have OO genetics. To be Type A, you would be AA, or AO. Similarly to be Type B, you would be BB or BO. So if the parents were AO and BO, in about 25% of the cases the baby would be OO. If the parents were (AA, BB), (AO, BB), (AA,BO) there would be no possibility of a type O baby.

 

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