Answer: Nationality is a cultural construct that can change based on circumstances.
Explanation: Nationality refers to the state of belonging to a particular nation. Nationality could be based on birth, by citizenship and so on.
The Boateng brothers, Kevin-prince Boateng and Jerome Boateng both played or represented different countries during the 2010 FIFA World cup in South Africa. Kevin-prince Boateng the elder represented Ghana while Jerome Boateng played for Germany. Their father being the same is a Ghanaian and different mother both from Germany. They are both eligible to represent any of the two countries, However, they both chose to represent different eligible nations based on certain considered circumstances.