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Father and mother ( B and O) the father alleles here are heterozygous (IBi)

IBi ... ii

children are :

IBi , IBi , ii , ii

so 50% of children may be type B

& 50% of children may be type O

but if the father B type is homozygous ( IBIB)

100% of children will be type B ,,, (IBi)

if father is (Rh+Rh+) and mother (Rh-Rh-)

all kids will be Positive.

but if father (Rh+Rh-) and mother (Rh-Rh-)

50% of children will be +

50% of children will be -.

Medical Answers need to be confirmed and re-confirmed.

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14y ago

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What is mom's genotype if her blood type is phenotype A and Dad's phenotype is B and her child's genotype is BO?

This cross AO X BO, would yield that genotype. This cross, AA X BO, would not yield BO. AO X BB would not do it either. So, I assume only AO ( and, from the info given, BO ) is possible for mom.


Is it true that to have a child with O blood type both parents have to be O type?

No, this is not true. The child has to inherit two type O genes, however. Blood type is inherited as a co-dominant factor. For instance: Mom is A+, but her blood type genes are A and O. Because of the codominant nature of blood types inheritance, her blood is type A. Dad is O-. He has two type O genes. If, during fertilization, an ovum from the mother with type O gene combines with one of Dad's spermatozoa, the child will be type O. If an ovum with type A gene is fertilized, however, the resultant child will have type A blood. Same goes for mom who is A and dad who is B, so long as their genes are A/O and B/O, they can still have a type O child. If mom is A/O and dad is B/B, however, there is no chance the child will have type O. The child could have type B (B/O pairing) or AB, however.


What would be the blood type of the child if the mother is B plus and the father is A plus?

ab+ a+ b+


Mother with AB- blood group and father with O plus blood groupwhat group will be the child?

The child could be either blood group A with Rh positive or blood group B with Rh negative. Both A and B are possibilities since the father has blood group O and can pass on either the A or B allele. The Rh factor (positive or negative) will depend on the mother’s AB- blood group.


If dad has blood type A and mom has blood type B can they have a child with blood type O?

Yes. Type O blood requires that you have two recessive genes, one from each parent. Each of your parents can carry one of these and have a different type of blood. In this case, there is a one in four chances of the child having type O blood.