At puberty, an increased production of hormones results in the development of ______________, the physical traits (other than reproductive organs) that identify an individual's sex.

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Secondary sex characteristics are the physical traits that distinguish males from females, such as facial hair for males and breasts for females. They are caused by an increase in sex hormones during puberty. Primary sex characteristics, on the other hand, are the organs directly related to reproduction, such as the testes and ovaries, and are fully developed before puberty. Hormonal correlates refer to the chemical changes in the body associated with sex hormones, but are not physical traits. Tertiary sex characteristics are not a recognized category of sex characteristics.

At Puberty, an Increased Production of Hormones Results in the Development