Before starting the class Biology of Gender, if someone asked me what the difference is between sex and gender I would look at them blankly and be curious to whether it was a trick question because obviously they both have the same meaning. But after my first day of class I would be able to confidently state the differences between the two. Sex is determined by your biological anatomy, your genitalia. A male has a penis and a female has a vagina. That on the other hand does not mean that someone who identifies to be a man does in fact have a penis. Gender is what we see ourselves as. Just because someone has the genitals that scientifically say that they are a specific sex means that they identify themselves as the gender that corresponds with their sex.
Gender is what people see themselves as. Someone may be a male, sexually, but they say that their gender is a female. Gender identity is not the same as gender expression. Gender identity is what people individually see themselves as. So if I being a male thought felt that deep down I was really a girl, then I would identify as being a woman. Gender expression is a little different, on the other hand. Gender expression is how you represent yourself and how others perceive your gender. Gender is more than just anatomy. Many people around the world have been suffering for years believing that they are different and have never been comfortable in their bodies. We are moving forward in the steps to make everyone feel comfortable with their true identities.