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Can parents both blood type B positive have a child with O negative blood type?
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+?
If both parents are A+ can a child be B+?
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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 +- co…mbination is so much more common than the -- combination. Genetics can be so confusing! I can easily see how after much research the issue would still appear murky. The modern science of genetics had its start in 1866 when an Austrian monk named Gregor Mendel provided a simple yet powerful description of how traits are passed on from one generation to another. Mendel's work was unappreciated until 1900 -- more than fifteen years after his death. In his initial formulation, he described how sexual beings get two genes for each trait, one from each parent. The trait expressed, or visible, is a result of the interplay between these two genes. Specifically, he recognized that some genes are dominant and some are recessive. If you have one copy of a dominant gene you will express that trait, regardless of the other gene. In order to express a recessive trait you must have two recessive genes. Mendel's first experiments, though simple, were quite profound. He worked with peas, which had easily distinguishable traits, such as green versus yellow seeds. Each pea has two seed-color genes, one from each parent. The peas with two yellow genes were yellow. Those with a yellow and a green gene were also yellow; only those with two green genes turned out to be to green. Thus yellow was dominant over the recessive green gene. The situation with human blood genetics is far more complex, since at each point there are multiple possible characteristics. Nevertheless, the genetics of human blood is far better understood than that of any other human tissue. First, let's look at the ABO blood types. 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. As it turns out, there are more than a dozen complete blood group systems other than the ABO system and the Rh system. This makes great precision possible in looking at inheritance and family trees. There is no reason, based on your blood type, to suspect that your parents might not really be your parents. If questions linger for other reasons, specific tests are available through blood banks that can settle the issue. Given the billions of unique people on this planet, the power and precision of genetic testing are amazing.
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.
Yes, this has to do not with the sugars (A or B, type O is a lack of either of these sugars) but with a gene that attaches the sugars to the cell surface, we'll call this gene… H. If one of the parents is deficient in gene H the parent may MAKE the A or B sugars but it has no way of being attached to the cell surface so the parent looks like they are type O. If the actual type O parent contributes a functioning H gene and the other "fake type O" parent contributes the gene that codes for the A sugar the child can be type A. This is an example of recessive epistasis.
Since negative blood types are recessive, both parents can have a recessive negative gene. This means that yes, two people with positive blood types can have a child with a n…egative blood type.
We are looking for the possible blood types of a baby. Parental information: Mother type A pos -- can be AA or AO and Rh (++) or (+-) Genes: A, O, (+), (-) …Father type A pos -- can be AA or AO and Rh (++) or (+-) Genes: A, O, (+), (-) Baby receives one gene from each parent: Baby is type AA + (++) = Type A pos Baby is type AA + (+-) = Type A pos Baby is type AA + (--) = Type A NEG Baby is type AO + (++) = Type A pos Baby is type AO + (+-) = Type A pos Baby is type AO + (--) = Type A NEG Baby is type OO + (++) = Type O pos Baby is type OO + (+-) = Type O pos Baby is type OO + (--) = Type O NEG YES, the baby of two Type A+ parents can be Type O+.
Yes! My Mom is A+ and my dad is O+. Out of 4 siblings, 2 of us are A- and 2 are O-. I was told it wasn't possible, but testing was done, and its true. I have to agree with thi…s as well. My mothe is A+ amd my father is O+ and I am A-! I started wondering, what the heck. Am I gonna be on Maury looking for my real daddy but it appears that is is quite rare but happens.
At least one parent would have to be B or AB. The other could be pretty much anything. Both could be either positive or negative.
Yes. If mother was A/O RH pos (D d) and Father is A/O RH neg (d d), then they could have a O positive child. One only needs one big D to express the RH positive gene.
It can be possible if both parents carry recessive genes for negativity.
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… be AA or AO with Rh (++) or (+-) Baby receives one gene from each parent: Baby is type AO Rh (+-) Mother must be Type A pos -- AA or AO and Rh (++) or (+-) Contributing genes: A, O, (+), (-) YES, since the father is contributing an O and (-), the baby might be Type A+, if the mother gives him the A and (+) genes. HOWEVER: There is more to ABO blood typing that just the ABO gene. There is also an inhibitory gene that will change any genotype into the phenotype O. Therefore a person with genetically AB blood can be tested as having Type O. Baby is type A+ which can be genetically AA or AO If one or both parents has the inhibitory gene affecting their AA, AO or AB type, then you can have two Type O parents (one Rh neg & other Rh pos) with a Type A offstpring. **Yes. My son is 0- and my daughter in law is 0+ and they just had a A+ baby boy. It is very rare but the doctor said it can happen because every has a primary and secondary (recessive) blood gene. Since my d-i-law's father is A+ and her mother is 0+ and his parents are both 0+ but his mothers mother is A+ and her Father is 0+ there are many recessive A+ genes in their DNA blood type therefore they can have a A+ child. (Example mother is O+/A+ and father is 0-/A+ equals= A+/0 child.) 0 seems to be universal and can throw off a recessive gene. In our case; since it is rare; the baby and the mother's blood types caused him to have alot of jaundice (18) so he had to go back in hospital to be under the light for an additional 24 hours to bring it down. She was nursing and her milk had not come in to give him the fluids to fight off the excess billiruben count. Other than that; it will not be a problem for either of them. Hope this helps, as it is hard to find this information on the Internet. Most sights say no because they are stating the normal without considering the recessive secondary gene type that are rare. Ask a doctor .....it happens
Yes. The geneotype for both parents must be AO+- for the child to be OO--
If both parents are O negative than the child will also be O negative. This is a special case with O negative, the same logic doesn't apply to other blood groups.
No, O is recessive and A is dominant.
Absolutely not. Type O is really Type "Zero", meaning the parents don't have either the A or the B factor. If they don't have it in the first place, they can't give it to thei…r child. Note that the reverse can happen -- Type A and type B parents can have a type O child. It just means that they have the type A or B proteins, but didn't pass it along to their child.
No. For a child to have a B blood type, at least one parent must have a B or AB blood type.
No, two type O parents can only have type O children. See the table below from www.dna-bioscience.co.uk/did_you_know_abo.shtml If you look at the row for mother's bloo…d type O where it intersects with the column for father's blood type O, you will see that the child's blood type must be O. For the child to be Rh+, only one of the parents has to be Rh+.
Yes, if they both have genes that are AO.