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Yes, if both parents each have the dominant positive AND recessive negative genes, they have a 1 in 4 chance of having a child with rh-neg blood. Both mother and father would have to pass the recessive gene to the offspring.

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Father has b positive and mother o negative can the baby be a negative?

No, the baby cannot be A-. A and B genotypes are codominant and O is recessive. Since the father is B and not AB, his genotype must be either BB or BO. The mother is OO. So there is no way for them to have an AO or AA baby. The baby can be Rhesus negative however, because the father may be heterozygous for the Rhesus factor.


What problems might occur if a mother is rhesus-negative and the father is rhesus-positive?

It is possible for there to be problems with a pregnancy. If mother's blood type is negative and the father's is positive, and the baby is positive, her blood type may begin to attack the child. Make sure she checks with her doctor regularly during a pregnancy.


Why do rh positive parents have an rh negative baby?

Each person carries two bits of rh imformation, called alleles, and each can be positive or negative. A person is rh+ if they have at least one positive allele. Only if both their alleles are negative are they considered as rh-. When two parents have a baby, they each pass one allele on. So if both parent has one positive and one negative allele, and both passed on their negative allele to their baby, then the baby would be rh negative. The chances of two rh positive parents having a rh negative baby are about 18%.


If the mother is A negative and the father is B positive what type of blood can the baby get?

It would all depend on the Dominant and Recessive blood type genes in the mother and father it is near improbable to tell unless you take a blood sample to test the blood type. == A rhesus negative mother and positive father can produce either a rhesus negative or positive child. A type A and type O parental combination will only produce either type A or type O children. So an A- mother and O+ father will normally produce offspring having the possible blood groups of A+ or A- or O+ or O-. See the link for a full explanation.


Can two parents with b positive make o positive?

Yes. The child will be either A positive or B positive or even AB positive. If the grandparents have a negative (A negative, B negative), there is a slight chance that the child will have a negative. A type O is out of the question. The fact that there are two positive parents means that there is no risk to the mother of Rh negative disorders.

Related Questions

Can the baby of an O rhesus positive and a A rhesus negative parent be A rhesus positive?

no cause a positive and negative make a negative unless the positive has a really strong blood line


What blood type will the child be with parents blood type O positive father and mother O positive?

The baby can only be an O Blood Group as both parents can only be carrying 'O' type genes. The baby would have a 75% chance of being an O positive and a 25% chance of being an O negative. This is because the mother can only pass on a Rhesus negative gene but the father might either have two Rhesus positive genes or one Rhesus positive and one Rhesus negative. If the first is true the child will only be O positive, if the second is true it could be O positive or O negative depending on which gene the father passes.


What produces rhesus negative blood in children?

I am a rhesus negative female. Both my parents had rhesus negatinve blood. I was a blue babie and had to have a blood transfusion. The second baby of 2 rh- parents is usually blue.


Why does haemolytic disease of the newborn not occur in rhesus positive mothers with a rhesus negative baby?

HDN only occurs in rhesus negative women who have been sensitized by positive blood. Rhesus positive mother can have a rhesus negative baby. In rhesus positive group, they have the antigen Rh. When this antigen from baby enters mother's blood circulation, because of inutero bleed in pregnancy; mother's blood cells will react to the foreign antigen and produce antibodies which are harmful to the baby's blood cells when they cross the placenta and enter baby's blood stream. These antibodies will break baby's blood cells down causing haemolytic disease. Whereas in rhesus positive mother with negative baby, if baby's blood enters mother's circultaion it will not produce any antibodies as there are no antigens in Rh negative blood. And if mother's blood mixes with baby's blood in the womb, baby will not have the ability to produce antibodies as their immune system is not developed. So there is no chance for haemolytic disease.


Can A positive mother O positive father can give A negative baby?

yes that's possible because A is dominant on O so the baby could have A (but not necessarily). negative is possible. it would mean that both parents have Dd as a rhesus factor.


What blood type will the child be with parents blood type o negative mother and father o positive?

The baby can only be an O Blood Group as both parents can only be carrying 'O' type genes. The baby would have a 75% chance of being an O positive and a 25% chance of being an O negative. This is because the mother can only pass on a Rhesus negative gene but the father might either have two Rhesus positive genes or one Rhesus positive and one Rhesus negative. If the first is true the child will only be O positive, if the second is true it could be O positive or O negative depending on which gene the father passes.


What will two negative parents have positive or negative baby?

a negative times a negative is a positive so the answer is positive


Is there a problem for the baby when the father is rhesus negative and the mother is rhesus negative?

No.there is no problem.Because both male and female are unable to produce rhesus antigen and there is no prouction of antibody inside the baby blood.


Can a b positive and a o nagitive have a a positive baby?

Yes. An O neg parent can only pass on an O Blood Group gene and a Rhesus Negative gene. A B pos parent can potentially pass on a B or an O Blood Group gene and potentially a Rhesus negative or positive gene. Statistically your baby would have a 75% chance of being a B blood group and 25% of being an O. Also, 75% likely to be a positive baby and 25% likely to be a negative baby.


When Parents with b positive and o positive blood have baby with o negative blood group?

I'll wait for you to ask the question. Positive parents can have a negative baby as positive is dominant so they may both have one positive and one negative gene and the baby gets the two negative genes.


Technique of exchange transfusion in jaundice what should be the blood group and rhesus factor to be used for exchange transfusion in a group a rhesus positive baby of a rhesus negative mother?

If the baby has already been born then you can transfuse A RH POS to the baby. If the baby is still in the womb I would think A RH NEG would be right.


Father has b positive and mother o negative can the baby be a negative?

No, the baby cannot be A-. A and B genotypes are codominant and O is recessive. Since the father is B and not AB, his genotype must be either BB or BO. The mother is OO. So there is no way for them to have an AO or AA baby. The baby can be Rhesus negative however, because the father may be heterozygous for the Rhesus factor.