If the mother has A positive blood and the father has B negative what would the child's blood type be?

Answer 1

If B blood type is heterozygous (IBi)

the expected blood type are 25% A, 25% AB, 50% B

If B blood type is homozygous (IBIB)

the expected blood type are

50% AB ....... 50% B

Answer 2

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

Parental information:

• Mother type B --can be BB or BO = contributes B or O gene
• Father type A --can be AA or AO = contributes A or O gene

Baby receives one gene from each parent:

• Baby is type AB = Type AB
• Baby is type AO = Type A
• Baby is type BO = Type B
• Baby is type OO = Type O

Therefore, depending on the parents' exact genotypes, the baby can be any of the 4 phenotypic ABO blood types.

Answer 3

We are looking for the possible blood types of the FATHER

Available information:

• Mother type A --can be AA or AO = contributes A or O gene
• Baby type A --can be AA or AO

Baby receives one gene from each parent:

• Mama type AA/AO + Papa AA/AO = Baby type AA, AO, OO
• Mama type AA/AO + Papa BO = Baby type AB, AO, BO, OO
• Mama type AA/AO + Papa AB = Baby type AA, AO, BB, BO, AB
• Mama type AA/AO + Papa OO = Baby type AO, OO

Papa cannot be Type BB as that cross would only give AB or BO results.

Other than that, as long as Papa contributes an A or an O, the baby will be Type A.

Answer 4

If the mother is blood type B and the child is AB negative, then the child must have received an "A" from the father, and must have received a "negative" from the father as well. The father, then, may be blood type A negative or AB negative.

Answer 5

We are looking for the possible blood types of the FATHER.

Available information:

• Mother type A --can be AA or AO = contributes A or O gene
• Baby type B --can only receive the O gene from the mother

Baby receives one gene from each parent:

• Mom type AO + Dad type BB/BO = Baby type BO, AB, AO, OO
• Mom type AO + Dad type AB = Baby type BO, AA, AO
• Mom type AO + Dad type OO = Baby type AO, OO

Generally speaking the dad cannot be Type O (OO) or Type A (AA or AO), since neither of these blood types would give the baby the necessary B gene.

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 Dad is Type O and has the inhibitory gene affecting his B or AB type,

then the Type B baby is definitely possible even from an AO x OO mating.

Answer 6

Could be any type, we get our blood groups from our parents or grandparents.

Answer 7

The child could be A+, A-, AB+, AB-, B+, B-, O+ or O-.

Answer 8

A baby with one parent type B and one parent type A may have any blood type. If the genotype of the parents were known, then better predictions could be made.

Answer 9

a/b/or ab