Differences between Gender and Sex

Gender and sex

The terms gender and sex refer to distinct concepts in sociology, medicine, and biology. While the two are often used interchangeably in colloquial speech, academic and professional organizations distinguish between biological attributes and social identities. Sex generally refers to the biological and physiological characteristics that define humans as female, male, or intersex. Gender refers to the socially constructed roles, behaviors, expressions, and identities of girls, women, boys, men, and gender-diverse people.

Comparison of sex and gender

Category	Sex	Gender
Basis	Biological (chromosomes, hormones, anatomy)	Social and cultural (roles, norms, identity)
Determination	Typically assigned at birth based on external genitalia	Internal sense of self and social expression
Stability	Generally fixed (though medical transition exists)	Can change over time or vary by culture
Variation	Male, female, and intersex	Man, woman, non-binary, agender, and others
Influences	Genetic and physiological processes	Cultural expectations, family, and media
Categorization	Primarily binary with biological variations	A spectrum that varies across different societies

Venn diagram comparing Differences between Gender and Sex

Biological sex

Sex is categorized based on several biological indicators. These include reproductive organs, germ cells (gametes), and chromosomal patterns. In humans, sex is usually determined by the presence of XX chromosomes in females and XY chromosomes in males. Hormonal levels, such as testosterone and estrogen, also contribute to the development of secondary sex characteristics during puberty.

The World Health Organization (WHO) notes that sex characteristics are not always strictly binary. Intersex refers to individuals born with biological traits that do not fit typical definitions for male or female bodies. These variations can involve chromosomal patterns, gonads, or genitals that differ from the standard XX/XY dichotomy.

Gender identity and roles

Gender is a social construct that dictates how individuals are expected to act and present themselves in a specific society. These expectations vary significantly between different cultures and historical periods. Gender identity is an individual's internal sense of being a man, a woman, neither, or both. This identity may or may not align with the sex assigned to them at birth.

Individuals whose gender identity matches their assigned sex are referred to as cisgender. Those whose identity differs from their assigned sex are referred to as transgender or gender-nonconforming. Gender expression involves the outward ways people manifest their gender through clothing, hairstyles, and behavior.

Institutional perspectives

Major health and scientific organizations have established formal policies to distinguish the two terms. The American Psychological Association (APA) states that sex is a biological status, while gender is the "attitudes, feelings, and behaviors that a given culture associates with a person's biological sex."

In 2001, the Institute of Medicine (now the National Academy of Medicine) recommended that researchers use these terms accurately to improve health outcomes. In clinical research, sex-based differences often relate to how a body metabolizes a drug or responds to a disease. Gender-based differences in health often relate to social factors, such as the likelihood of seeking medical help or exposure to occupational hazards.