| cline | A geographic continuum in the variation of a particular trait.
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| folk taxonomies | Cultural categories for important items and ideas. Gender and race are examples of folk taxonomies.
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| gender | The cultural categories and characteristics of men and women. The translation of sex into a folk taxonomy. Compare with sex.
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| heritability | The amount of variation of a particular trait within a population that is caused by genetic, as opposed to environmental, differences.
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| polytypic | A species with physically distinguishable regional populations.
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| races | In biology, the same as subspecies. In culture, cultural categories to classify and account for human diversity. See folk taxonomy.
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| racism | Judging an individual based solely on his or her racial affiliation.
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| reification | Translating a complex set of phenomena into a single entity such as a number. IQ test scores are an example.
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| semispecies | Populations of a species that are completely isolated from one another but have not yet become truly different species.
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| sex | The biological categories and characteristics of males and females. Compare with gender.
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| subspecies | Physically distinguishable populations within a species. See races.
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