1) Gender identity 
Bigender, bi-gender or bi+gender describes a tendency to move between feminine and masculine gender-typed behavior depending on context. Some bi-gendered individuals express a distinctly `female` persona and a distinctly `male` persona, feminine and masculine respectively; others have shades of grey between the two. It is recognized by the Ame...
a person who identifies as a mixture of two genders. Usually (but not always) a denial of biological reality. See Intersex
person who possesses and expresses a distinctly masculine persona and a distinctly feminine persona. This person is comfortable in, and enjoys, presenting in both gender roles.