Justin has type a blood and his wife brittany has type b blood. justin's parents both have type ab blood, and brittany's parents also both have type ab blood. what are the chances that justin and brittany's son theodore has type a blood

Since parent of both Justin and his wife Brittany have blood group ab, this means Justin is homozygous(aa) for blood group a and similarly his his wife Brittany is also homozygous (bb) for blood group b. Therefore, Justin and Brittany's son Theodore will certainly have ab blood group.

age range would be the answer