Gender corresponds to the societal and cultural difference between the sexes, as opposed to the biological, and is socially constructed [4]. Gender is part of what changes how we act and think, both as normal psychological and behavioral processes, and in more inherent ways as determined by some studies [3]. It commonly is assigned based on sex, but in many cases, some people innately feel that their gender is different than the one assigned to them.
In biological terms, sex may be determined by a number of factors present at birth, including the number and type of sex chromosomes, the type of gonads (ovaries or testicles), the sex hormones, the internal reproductive anatomy (such as the uterus in females), and the external genitalia. People whose characteristics are not either all typically male or all typically female at birth are intersex. [1]
There are many different conditions in which a person's sex organs may not match up with levels of hormones in their body, primary or secondary sex characteristics[2], or someone's internalized gender identity. It's important to note that these are not deformities, but simply conditions that different people are born with. Doctors around the world have for centuries actually been surgically intervening and modifying the sex organs of babies to fit the surgeon's or parents' expectations, which is now considered a human rights violation and widely condemned by the international community [5].
So some people are born with one set of chromosomes, and/or one set of genitalia that may not be typical, yet exhibit some or all of the other characteristics and thoughts of someone with a different set. Their gender may not correspond to their sex, or sex organs.
Hence, it is better to refer to gender differences than sex differences when talking about the roles of people in society. Unless we're specifically talking about making babies, and even then it's not totally simple.
Gender corresponds to the societal and cultural difference between the sexes, as opposed to the biological, and is socially constructed [4]. Gender is part of what changes how we act and think, both as normal psychological and behavioral processes, and in more inherent ways as determined by some studies [3]. It commonly is assigned based on sex, but in many cases, some people innately feel that their gender is different than the one assigned to them.
In biological terms, sex may be determined by a number of factors present at birth, including the number and type of sex chromosomes, the type of gonads (ovaries or testicles), the sex hormones, the internal reproductive anatomy (such as the uterus in females), and the external genitalia. People whose characteristics are not either all typically male or all typically female at birth are intersex. [1]
There are many different conditions in which a person's sex organs may not match up with levels of hormones in their body, primary or secondary sex characteristics[2], or someone's internalized gender identity. It's important to note that these are not deformities, but simply conditions that different people are born with. Doctors around the world have for centuries actually been surgically intervening and modifying the sex organs of babies to fit the surgeon's or parents' expectations, which is now considered a human rights violation and widely condemned by the international community [5].
So some people are born with one set of chromosomes, and/or one set of genitalia that may not be typical, yet exhibit some or all of the other characteristics and thoughts of someone with a different set. Their gender may not correspond to their sex, or sex organs.
Hence, it is better to refer to gender differences than sex differences when talking about the roles of people in society. Unless we're specifically talking about making babies, and even then it's not totally simple.
[1] https://en.wikipedia.org/wiki/Intersex [2] https://en.wikipedia.org/wiki/Virilization [3] https://en.wikipedia.org/wiki/Sexual_differentiation_in_huma... [4] https://en.wikipedia.org/wiki/Sex_and_gender_distinction [5] https://en.wikipedia.org/wiki/Sex_assignment#Controversy