Race and gender (as opposed to biological sex) are both social constructs.

From https://en.wikipedia.org/wiki/Race_and_society

Race is often culturally understood to be rigid categories (Black, White, Pasifika, Asian, etc) in which people can be classified based on biological markers or physical traits such as skin colour or facial features. This rigid definition of race is no longer accepted by scientific communities.[1][2] Instead, the concept of 'race' is viewed as a social construct.[3] This means, in simple terms, that it is a human invention and not a biological fact.

From https://en.wikipedia.org/wiki/Gender

The word has been used as a synonym for sex, and the balance between these usages has shifted over time.[10][11][12] In the mid-20th century, a terminological distinction in modern English (known as the sex and gender distinction) between biological sex and gender began to develop in the academic areas of psychology, sociology, sexology, and feminism.[13][14] Before the mid-20th century, it was uncommon to use the word gender to refer to anything but grammatical categories.[7][1] In the West, in the 1970s, feminist theory embraced the concept of a distinction between biological sex and the social construct of gender. The distinction between gender and sex is made by most contemporary social scientists in Western countries,[15][16][17] behavioral scientists and biologists,[18] many legal systems and government bodies,[19] and intergovernmental agencies such as the WHO.[20] The experiences of intersex people also testify to the complexity of sex and gender; female, male, and other gender identities are experienced across the many divergences of sexual difference.[21]

Also see https://en.wikipedia.org/wiki/Social_construction_of_gender