what are the possible blood types of an offspring of a cross between an individuals that are type AB and type O blood?

A or B

Explanation:

AB is dominant 'o' is recessive

Drawing the punnet square :

A B __

_ o ___ Ao Bo

_ o ___ Ao Bo

Here, the 'o' allele is recessive, therefore the A B allele overshadows the 'o' allele,

Hence, the possible blood group types the offsprings could have is ;

A, A, B, B. Meaning that each offspring will have a 50 - 50 chance of being in the A or B blood group.

There will be no possibility of the offsprings belonging to the AB or o blood group.

The punnet square depicts the possible outcome.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex