Typically gender expression is heavily influenced by societal norms, but there are some traits that have been proven to be influenced my genetic makeup of males vs females. For example, girls tend to be drawn to more artistic expression because of the cone/rod ratio of their eyes, where as males have better perception of depth and speed, so they gravitate towards faster sports and race cars. Obviously this only has partial influence. Individuals have always ventured outside gender roles and norms. Some men express are in touch with their femininity and express it despite the stigma, and some women have more ‘male inclined’ personality traits. Of course, large political, philosophical, and religious movements have more impact, such as the feminist movement in the late 1960s-70s pushing females to act less in the traditional frame.
