subcultures are defined as those whose members' unique shared behaviors are based on a common racial, language, or national background.

Ethnic.

Explanation:

Ethnic subcultures are described as those in which members formed a unique identity based on the shared practices of common culture, tradition, language, or national background. In general, these communities are part of a larger culture or community with whom they share values, behaviors and sometimes genetics inheritance. But it should be noted here that many Americans are associated with more than one ethnic group.

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.