A child has type O blood. Could a man with AB blood be the father?

Answer 1

Your Answer is NOT LIKELY, but possible, a man with AB bllod cannot have a type O child.

Blood groups are inherited from both parents. The ABO blood type is controlled by a single gene with three alleles: i, IA, and IB. The gene encodes a glycosyltransferase - that is, an enzyme that modifies the carbohydrate content of the red blood cell antigens. The gene is located on the long arm of the ninth chromosome (9q34).

IA allele gives type A, IB gives type B, and i gives type O. IA and IB are dominant over i, so ii people have type O, IAIA or IAi have A, and IBIB or IBi have type B. IAIB people have both phenotypes because A and B express a special dominance relationship: codominance, which means that type A and B parents can have an AB child. Thus, it is extremely unlikely for a type AB parent to have a type O child (it is not, however, direct proof of illegitimacy): the cis-AB phenotype has a single enzyme that creates both A and B antigens. The resulting red blood cells do not usually express A or B antigen at the same level that would be expected on common group A1 or B red blood cells, which can help solve the problem of an apparently genetically impossible blood group. [8]

Evolutionary biologists theorize that the IA allele evolved earliest, followed by O (by the deletion of a single nucleotide, shifting the reading frame) and then IB.[citation needed] This chronology accounts for the percentage of people worldwide with each blood type. It is consistent with the accepted patterns of early population movements and varying prevalent blood types in different parts of the world: for instance, B is very common in populations of Asian descent, but rare in ones of Western European descent.)

To your question, a child with Type O blood could have the following matching possibilities as parents:
Mother/Father
O/O
O/A
O/B
A/O
A/A
A/B
B/O
B/A
B/B

The following Parent blood types CANNOT have a type O child

AB/O
AB/A
AB/B
AB/AB
O/AB
A/AB
B/AB

Answer 2

ABO Blood Type Analysis

Submitted Blood Types:

Biological
Mother unknown
Child o+
Alleged Father AB+


ABO Result: Likely Excluded
RH (+/-) Result: Not Excluded

Summary: The Alleged Father is Likely Excluded from being the biological father of the child because the blood type from the Alleged Father is inconsistent with the Child and Biological Mother

Results from an ABO/RH comparison are not as reliable as a DNA Paternity test. Though blood types may be consistent, this does not provide conclusive proof of paternity. Remember, too, that errors in recording (and/or remembering) blood type are common and an exclusion from this calculator may still be inaccurate.

We recommend choosing a GeneTree Paternity Test to provide an answer that's up to 100% accurate. Click here to learn more about GeneTree DNA Paternity Testing services.

Important: Test results can be misleading if the Biological Mother is not included. For best results in the traits analysis or a DNA test, the Biological Mother should be included.

What is the mother's blood type? then I could answer this better...are the child and father positive?

Answer 3

no, there is not possible way for a child to have type O blood and for the father to be type AB. The child's blood type is determined by the parents blood type. You can use a Punnet Square next time to determine if the offspring belongs to the father.

Answer 4

NO WAY! the father gives the gene to type A or type B, so, if the mother is type O, the child only could be type A or B.

Answer 5

Yes. A childs blood type has nothing to do with the blood type of the parents

Answer 6

In reality it is not because the AB blood is co dominants allele and dominants to recessive allele O so the AB must previewed but if the mutation occurred in DNA sequence that’s make to presence of mutation by O allele to have an affected chilled by mutation

Answer 7

Yes, depending on the blood type of the mother, now stop posting this question!

Answer 8

yes

Answer 9

No. .