Variations in Sexual Behavior

• Genes that make an individual more appealing to the other sex

  sexual selection
• how we identify sexually and what we call ourselves.

  Gender identity
• The biological differences between males and females

  sex differences
• the differences that result from people’s thinking about themselves as male or female

  gender differences
• Individuals who appear to be a mixture of male and female are referred to as

  hermaphrodites
• meaning overdevelopment of the adrenal glands from birth.

  congenital adrenal hyperplasia (CAH)
• which stimulates the adrenal gland.

  adrenocorticotropic hormone (ACTH)
• People whose sexual development is intermediate

  intersexes
• Certain individuals with an XY chromosome pattern have the genital appearance of a female.

  androgen insensitivity
• • Some genetic males are born with a very small penis
  • a defect of pelvis development

  cloacal exstrophy