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Each person receives an A, B, or O gene from each parent. In this system, the A and B genes are co-dominant and the O gene is recessive. Thus, a person whose genetic type is either AA or AO will have blood type A, those with genetic type BB or BO will have blood type B, and only those genetic type OO will have blood type O. This means that a child with type O blood could have parents with type A, type B, or type O blood (but not with type AB). Conversely, if two parents both have type O blood, all their children will have type O blood.
Another medically important blood type is described in the Rh system. These genes were first discovered in the rhesus monkey, hence the designation Rh. The Rh system is actually far more complex than the ABO system in that there are 35 different possibilities that one could inherit from each parent. These, however, are roughly grouped into positive and negative types. In this system the positive are dominant over the negative. If your genetic type is ++ or +-, your blood type will be Rh positive. Only if your genetic type is -- will you be Rh negative. This means that if both parents have Rh+ blood with the +- genes, they could have children who are ++, +-, or --. In other words, their children could be either Rh positive or Rh negative. Children who are Rh negative can have parents who are either Rh positive or Rh negative.
Two parents who have O positive blood could easily have a child who is O negative. In fact, most children who are O negative have parents who are positive, since the +- combination is so much more common than the -- combination.
What else can I help you with?
Can two parents with A positive blood have a child with O negative blood type?
No.
If both parents have positive blood type will the child have a positive?
Probably, because it only takes one positive gene to have positive type blood. But if the positive parents each have one positive and one negative gene, there is a 25% chance their child will be negative.
Father AB positive and mother B positive can child be A negative?
Yes, it is possible for parents who are AB positive and B positive to have a child who is A negative. This is because a child can inherit one A and one Rh negative gene from the parents, resulting in blood type A negative.
Can negative and a positive blood type make a positive?
If one of the parents is A positive, the child could be A positive.
Can parents with B negative and AB positive have a child with O negative?
No, parents with B negative and AB positive blood types cannot have a child with O negative blood type. The O blood type is inherited from both parents who must pass on the O allele to the child. Since neither parent in this case carries the O allele, they cannot have a child with O negative blood type.
Can parents who have B negative and O positive blood types have a child with O positive blood?
No, they will have a O negative child.
Can parents with b positive and a negative blood have a child with o positive blood?
Yes, you very much can have a child with O positive blood.
Can two parents with o positive have a child with a A negative blood type?
it is possible but the child can be a positive
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 positive gene and one negative gene. If both positive parents pass on their negative gene, they can have a child with a negative blood type.
Can a child with o negative blood have the same parents as a child with o positive blood?
yes
Can two parents with A positive blood have a child with O negative blood type?
No.
Can parents with b negative blood have a child with o positive blood?
If both parents are B- they can only have children who are B- and O-. One would have to be positive in order to have a child with positive blood.
If both parents have positive blood type will the child have a positive?
Probably, because it only takes one positive gene to have positive type blood. But if the positive parents each have one positive and one negative gene, there is a 25% chance their child will be negative.
Can negative and a positive blood type make a positive?
If one of the parents is A positive, the child could be A positive.
Can a A positive blood type mother give birth to Rh negative daughter?
Can a child with RH neg blood come from parents that are A positive and A negative
Father AB positive and mother B positive can child be A negative?
Yes, it is possible for parents who are AB positive and B positive to have a child who is A negative. This is because a child can inherit one A and one Rh negative gene from the parents, resulting in blood type A negative.
Can two parents who have positive blood type have a child with negative blood type?
yes they can
