Final answer:
Intersex is a term used to describe individuals with atypical sex traits. Klinefelter syndrome is a form of intersex characterized by an XXY genotype, resulting in male traits. Other types of intersex include Turner syndrome and Androgen Insensitivity Syndrome.
Step-by-step explanation:
Intersex is a general term used to describe people whose sex traits, reproductive anatomy, hormones, or chromosomes are different from the usual two ways human bodies develop. Some intersex traits are recognized at birth, while others are not recognizable until puberty or later in life. Klinefelter syndrome is a form of intersex where individuals have an XXY genotype, resulting in male characteristics such as small testes, enlarged breasts, and reduced body hair. Other types of intersex include Turner syndrome (XO genotype) and Androgen Insensitivity Syndrome.