Possibly a Punnett Square question, but not sure!?

Question

What percentage of offspring will have blood type A if the parents have blood types AB and O? What percentage will have blood type O?

Answer 1

It is a Punnett Square question.

-------A-------B

O----AO-----BO

O----AO-----BO

50% have A; 50% have B; 0% have O.

A and B have codominance, and O is recessive, so even though there are genotypes AO and BO, they cause blood types A and B, respectively.

Answer 2

Yep, this is a punnett square question.

-----A----B

O--OA OB

O--OA OB                  

50% blood type A

50% blood type B

50% chance of offspring having blood type A, 0% chance of offspring having blood type O.

(note that blood type O is when you have a lack of either A or B. It is recessive and when you have it with an A or a B as in the punnett square above, it is not expressed)

Answer 3

Parents            AB ..............OO

gametes       A,B    ...............O

F1...............1AO   : 1BO

Genotypes    50% Group A , 50% Group B

0% Group O

Hope this helps!