Final answer:
It is important to include both sexes and members of every racial/ethnic group and subpopulations as participants in research. Sociological topics that might show gender differences include gender roles, gender inequality, and gender socialization.
Step-by-step explanation:
It is important to include both sexes and members of every racial/ethnic group and subpopulations as participants in research. This ensures that the findings are applicable to a diverse range of individuals and prevents any bias or exclusion. Sociological topics that might show gender differences include gender roles, gender inequality, and gender socialization. For example, a study on gender roles might examine how men and women are socialized differently and how this impacts their behavior and attitudes.