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Can parents both blood type B positive have a child with O negative blood type?

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Yes parents who are both B blood group can have a child with O negative. This is because B blood group only requires one parent gene to be B to have B blood group - they may also have one O gene. People have two blood group genes, one from both parents. B gene is "dominant" as is A gene. O gene is "recessive". AB blood group means a person has one A gene and one B gene B blood group means a person has either one B gene and one O gene or two B genes A blood group means that a person has either one A gene and one O gene or two A genes O blood group means that a person has two O genes Rhesus positive or negative is similar - positive is dominant and therefore a person with one positive gene and one negative will be rhesus positive. A person who is rhesus negative has both negative genes, and received one negative gene from both parents, both who may be rhesus positive ( with one positive and one negative gene each). Importance of O negative blood - O negative blood group is called the "universal donor" because the blood is least likely to cause transfusion reactions so is safest to use in an emergency before blood groups can be identified and matched.
If both parents are A+ can a child be B+?
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Can an O negative blood type father parent an A positive blood type child?

 We are looking for the possible blood types of a MOTHER   Available information:   Father type O neg-- can only be OO Rh (--)  Genes: O, (-)  Baby type A pos-- can

Can a child have a negative blood types if the parents are both a positive?

Yes! Parents have two genes for pos/neg blood type, and only one of them needs to be positive for the parent to have positive blood type. Most positive-blooded people have one

Can parents both with O positive blood type have a child with blood type A?

My cousin uses to work for the Blood Transfusion Service and I was asking about this some time ago - the answer is no. :)) I'm not sure if this is the proper way to add my ans