Gender identity refers to a person's innate, deeply felt psychological identification as a man, woman or any other gender, which may or may not correspond to the gender assigned to them at birth.
Gender expression refers to the ways in which we present or perform our gender, including: behaviour, body language, voice, chosen name, pronouns, dress, hair and make-up.
Neither gender identity or gender expression are inherent to one sex, although they can be influenced by social and cultural expectations. Everyone has a different understanding of their gender identity and how they express their gender. One’s gender identity and gender expression may or may not conform to social norms that are associated with a particular sex.