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We are looking for the possible blood types of a baby.

Parental information:

  • Mother type O --can only be OO = contributes the O gene
  • Father type AB --can only be AB = contributes A and B genes
Baby receives one gene from each parent:
  • Baby is type AO = Type A
  • Baby is type BO = Type B
Generally speaking, with these parents there would be a 50% chance of either having a Type A or Type B baby.

HOWEVER: There is more to ABO blood typing that just the ABO gene.

There is also an inhibitory gene that will change any genotype into the phenotype O.

Therefore a person with genetically AB blood can be tested as having Type O.

If the Type O parent has the inhibitory gene affecting his Type A, B or AB blood, then other blood types for the baby are possible.

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Wiki User

10y ago
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Wiki User

10y ago

If a mother with blood type O and father with blood type AB produce offspring, there is a 50% probability that the offspring will be blood type A and 50% probability that offspring is blood type B.

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Wiki User

12y ago

AO, BO - The Blood type will not be AB, or O.

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Wiki User

13y ago

A and B only.

50% of the Kids could be A.

50% of the Kids could be B.

Confirmation needed.

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Wiki User

11y ago

child could be A or B.

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Wiki User

15y ago

A or O

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15y ago

Just O

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Q: What are the blood types possible in offspring if both parents are type O?
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