Nah, it really isn't. Scientific biology tells you that you can mimic and roleplay all you want, but it is impossible to fully transition to the only other gender-alternative, than the one you're created as. There are two biological genders: male and female. Besides those, there exists a mutation called a hermaphrodite, which really is not a gender.. conceptions of alternate genders (identities) are notions, ideas and mental illnesses..