The rhesus factor (positive and negative) isn't important so...
The A (and B) blood type genes are dominant over O (which actually just means the lack of A/B). Since mum and dad are both blood type O neither mum or dad have the A gene which means the baby cannot be type A. A different dad (or mum) with blood type A or AB would be needed.
Yes. That pair have no blood type incompatibilities.
Sure.
Just because the babys blood and the fathers blood is different, it doesnt mean that there is a possibility that he ain't the father. For example, my fathers blood is different from my sisters and including but he still my father. I hope that answered your question. You are A dominant, but you have the O+ recessive gene. To rephrase what the others have said- if the mother is A plus, she would be AA or AO bloodtype. The father is something with an O as well, if the baby has an O. Father could be BO< AO< OO etc. (or he could have negative blood, and still have a positive blood child from this union)
Nope. Generally there may be problems only if mother is negative and the father is positive. The antibodies to A/B blood types are too large to pass through the placenta and so cannot hurt the baby.
ab+ a+ b+
then the baby will be O plus, or AB plus , I think .
Yes.
Yes - and the baby will have a blood type of O.
Yes. That pair have no blood type incompatibilities.
Sure.
It is possible. It depends on the blood group of the mother.
The baby's blood type would either be type A or type O. The father (phenotype A) could have an underlying genotype of either AA or AO. Therefore, the baby could have either type A (AO - with A from the father and O from the mother) or type O (OO - with O from the father and O from the mother) blood.
No
Yes, it is possible. The geneotype of the mother would be either BB or BO and for the father would be OO. If you cross the father's geneotype and either of the mother's then at least two of the four outcomes will be for B blood type. As for the - and +, positive is dominant over negative. The father could be + - or + + and the mother would be - -. Either combination would result in at least two positives. Therefore, it is possible for the mother to be B-, the father to be O+ and the baby to be B+. I added the link to the website where I got my info from. I want to know if an rh b neg blood type mother and an O positive father can have an A positive baby?
Yes, it is possible. The geneotype of the mother would be either BB or BO and for the father would be OO. If you cross the father's geneotype and either of the mother's then at least two of the four outcomes will be for B blood type. As for the - and +, positive is dominant over negative. The father could be + - or + + and the mother would be - -. Either combination would result in at least two positives. Therefore, it is possible for the mother to be B-, the father to be O+ and the baby to be B+. I added the link to the website where I got my info from. I want to know if an rh b neg blood type mother and an O positive father can have an A positive baby?
yes
yes, there is a chance to have a baby w/ A+