When a person inherits the following combinations of alleles, which is dominant? Remember, the answer can be one of the alleles or both of the alleles.
• A and B
• A and O
. B and O

You need just one copy to be dominant. Let's assume A is dominant so A & B

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.