Final answer:
Lactose intolerance is the type of intolerance that Mexican Americans and African Americans have a higher incidence of compared to other populations.
Step-by-step explanation:
Lactose intolerance is a type of food intolerance in which the body is unable to digest lactose, the sugar found in milk. It occurs when the small intestine does not produce enough of the enzyme lactase to break down lactose. Mexican Americans and African Americans have a higher incidence of lactose intolerance compared to other populations. This means that individuals from these communities may experience symptoms such as stomach cramping, diarrhea, tiredness, and weight loss when they consume dairy products.