Explore key concepts and research through these links to additional web resources.

11.1 Sexual dimorphism and sex

• Evolution of Mating
  Sexual selection and the evolution of mating systems are major research topics at a number of institutions. Read descriptions of current research projects.
  Keywords: sexual selection, mating, research

11.2 Sexual Selection on Males: Competition

• Male Reproductive Strategies
  The Department of Animal Ecology, Evolutionary Biology Centre in Upsala provide background and theory, as well as, information about the study of male reproductive strategies.
  Keywords: male reproduction, mating strategies, evolution
• Wolf Spider Courtship
  Dr Matt Persons' website introduces the background and theory about the study of animal behavior. Further down the page you can learn about the courtship displays of the wolf spider.
  Keywords: courtship, mating behavior, wolf spider

11.3 Sexual Selection on Males: Female Choice

• Challenging Darwinian Sexual Selection
  Another hypothesis about sexual selection, presented as an alternative to the "good genes" hypotheses is described here. Is this hypothesis really novel?
  Keywords: sexual selection, hypothesis, mating behavior
• Bowerbird Dating
  This article from Science News Online reviews the courtship behavior of the bowerbird. Does the female bowerbird play an important role in courtship?
  Keywords: bowerbird, mating, courtship behavior

11.4 Sexual Selection on Females

• Infanticide and Sexual Selection
  By Jim Moore from the Anthropology Department at The University of California, San Diego, this article from the journal Primates presents an alternative to the sexual selection hypothesis for male infanticide in two species of mammals.
  Keywords: sexual selection, infanticide, socio-biology

11.5 Sexual Selection in Plants

• Botanical Battle of the Sexes
  In this article from Scientific American, you can learn about how separate-sex plants might have evolved.
  Keywords: plants, sex organs, evolution
• Plant Reproductive Strategies
  Professor Jill Miller from Amherst College studies the evolution and diversification of reproductive strategies in plants. Here you can learn more about her research with the Woflberry shrub.
  Keywords: wolfberry, reproductive strategies, evolution

11.6 Sexual Dimorphism in Body Size in Humans

• Why do men have nipples?
  Andrew Simons, a professor of biology at Carleton University in Ontario explains the evolutionary ideas behind sexual dimorphism. This website is sponsored by Scientific American magazine.
  Keywords: sexual dimorphism, evolution, adaptation