Final answer:
The primary anthropological position is that gender is a cultural construct that varies across cultures and is formed through social institutions and everyday practices.
Step-by-step explanation:
The primary anthropological position on sex-gender roles and biology is that the cultural roles of gender assign certain behaviors, relationships, responsibilities, and rights differently to people of different genders. While sex is based on biology, gender is a cultural construct that varies across cultures and is subject to change over time. Anthropologists study how people's ideas of gender are formed in their minds, bodies, social institutions, and everyday practices.