Can A and AB blood type parent have baby with O- type?

Answer 1

We are looking for the possible blood types of a PARENT.

Available information:

• Mother type AB --can only be AB = contributes A or B gene
• Baby type O -- can only be OO = has to receive an O from each parent

Baby receives one gene from each parent:

• Mom type AB + Dad type AA/AO = Baby type AA, AB, AO, BO
• Mom type AB + Dad type BB/BO = Baby type BB, AB, BO, AO
• Mom type AB + Dad type AB = Baby AA, AB, BB
• Mom type AB + Dad type OO = Baby AO, BO

Generally, since the AB parent cannot contribute an O gene, baby cannot be OO or Type O.

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.

If the baby's inhibitory gene has been turned "on", then no matter what ABO genes he receives from his parents, he will test out as a Type O.

Answer 2

Yes, it is possible for an A or AB blood type parent to have a baby with O- type if both parents are carriers of the O- blood type. The O- blood type is recessive, so both parents must pass on the O- gene for the baby to have O- blood type.

Answer 3

no, its impossible ,because blood type AB contains antigen A and antigen B on the surface of red blood cells because genetically there are allele A and allele B in the gene so when the assortment of allels occure in meiosis there must be either allele A or B ,but in order to have O blood type there must be no alleles in the gene location.

Answer 4

No. O is recessive and must be homozygous to be expressed. If both parents were O, then this would be the only possible cross.

OO X OO

------------

Not disagreeing with, but adding on to the above: Unless something very unusual is going on, two type O parents would not produce type AB offspring. Having blood type O means that you carry neither the gene for type A nor the gene for type B; having blood type AB means you have both those genes -- so two type O parents would normally have a type O child, and a type AB child could come from one type AB parent and one parent of any blood type, or from one type A parent and one type B parent.

Unusual things that could happen to produce unexpected genetic blood-type results include a functional mutation that turns an un-expressed or faulty copy of the A or B gene in a parent into an expressed copy in the child, or chimerism or mosaicism, where some cells in a body (including, in our hypothetical, most of the blood-producing cells in one of the parents) are genetically different from other cells in that same individual (including, in our hypothetical, the gonads of that parent). These things are far less likely than an error either in the blood tests or in the attribution of parentage, but they do happen.

Answer 5

No, genes come in pairs, or at least for blood types, which means if your A you are really AA or AO, O is a recessive gene and is ignored unless it is OO, which is just O, so even if one of your parents is AO and the other AB, it is impossible to get the combination of OO.

Answer 6

yes it is possible that a child can get o blood from a parent with ab. =)=)=)=)=)

Answer 7

No - the child needs to inherit at least one of the parent's alleles. Therefore if the parent has blood type AB, they must donate either an A or a B to the child.

Answer 8

Babies inherit mostly in all but rare cases, only one of the blood type alleles A, B, or O from each mom and dad. So, even if each parent had type AB, the kid could have AA, AB, or BB blood.

Answer 9

yesType your answer here...

Answer 10

yes