The ways in which a person identifies and/or expresses their gender, including self-image, appearance, and embodiment of gender roles. One’s sex (e.g. male, female, intersex, etc.) is usually assigned at birth based on one’s physical biology. One’s gender (e.g. male, female, genderqueer, etc.) is one’s internal sense of self and identity.
Check our guide on the basic knowledge of sexual identity at this link.