a person 's brain often reflects their gender . however their hands can also indicate if their brain is more female or male .
why are some skills or characteristics considered male or female-specific ?
documentary examines if gender-specific traits are due to biology -lrb- occuring from birth -rrb- or develop as a result of environment .
the film examines different theories and studies about gender and the brain .
study says fingers can indicate how much testosterone is in a person 's body .
is your brain male or female ? documentary premieres on sbs one on monday at 7.30 pm .