if a woman has blood type O and a man has blood type AB what possible blood types could their offsprings have?

Answer 1

Only A or B are likely. O is slightly possible (see below).
(There are a lot of wrong answers for this one)

There are three alleles for human ABO blood types. IA, IB and i. Each person can have two of these with the following combinations;

IA IA = Type A
IA i = Type A
IB IB = Type B
IB i = Type B
IA IB = Type AB
i i = Type O

If the mother is type O (i i) and the father is AB (IA IB), then the only combination for offspring are IA i (type A) or IB i (type B); each with 50% probablity.

A type O offspring would be slightly possible because there is another gene that rarely keeps the antigens from binding to the outside of the cell, making the cell phenotypically O but genotypically something else.

Answer 2

All of the above are incorrect!

The ONLY types that a child of those 2 could have are A or B. AB cannot be passed to a child since each parent offers only one allele. A & B are co-dominant genes, while O is recessive.

Each biological parent donates one of their two ABO alleles to their child. A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).
http://www.biology.arizona.edu/human_bio/problem_sets/blood_types/inherited.html#calculator

Parent 1 AB
Parent 2 O
Possible blood type of child ---

A OR B

http://www.givelife2.org/aboutblood/bloodtypes.asp

Answer 3

Blood type is NOT determined by the father! Both parents contribute equally to the genotype of the child. Since the mother is O, and only O, she can only pass a gene for O onto her child. Since the father is AB, which are co-dominant, he can either pass the gene for A or the gene for B, to this child. Thus the child would be either A or B. Since O is recessive to A and B, the child would be heterozygous for A or B, carrying his or her mother's recessive gene for type O.

Answer 4

A or B ONLY! Here is the Punnet square:

__| O | O |
A |AO|AO|
B |BO|BO|

The genotype AO yields blood type A, and ditto with BO.

Answer 5

Did you watch Saved by the Bell this morning?
Zack totally got caught passing notes when the teacher asked this very same question.

Answer 6

there are alleles for blood groups......THREE IN NUMBER
A AND B ARE CO-DOMINANT
i IS RECESSIVE
BLOOD GROUPS........
A--iA.....DOMINANT
B--iB.....DOMINANT
AB--AB......CO-DOMINANT
o--ii......
WOMAN----ii.................
RECESSIVE HOMOZYGOUS

MAN---AB.............
THE OFFSPRING CAN BE
AB x ii
that is
iA .......50%......
HETEROZYGOUS DOMINANT
OR
iB........50%...........
HETEROZYGOUS DOMINANT

THE CHILD CAN BE EITHER A OR B BLOOD GROUP
OR IN OTHER WORDS...
HE WILL HAVE A BLOOD GROUP DIFFERENT FROM EACH OF HIS PARENTS
BECAUSE.........
NEITHER OF HIS PARENTS IS HETEROZYGOUS

Answer 7

They could be only A or B.

Answer 8

They could have AB or O

Answer 9

O A B AB

Answer 10

AB

The blood type is determined by the fathers blood type.