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  • From Butterflies to Humans

    From Butterflies to Humans

    Lecture

    (58 min 30 sec) How and why butterflies and fruit flies got their spots, and the fossil record for human evolution.

  • Fossils, Genes, and Embryos

    Fossils, Genes, and Embryos

    Lecture

    (58 min 30 sec) The genetic mechanisms by which evolution occurs, and an overview of the evidence for evolutionary theory.

  • Selection in Action

    Selection in Action

    Lecture

    (58 min 29 sec) Comparing the artificial selection of dogs and corn with the natural selection of the stickleback fish.

  • Evolution: Constant Change and Common Threads

    Evolution: Constant Change and Common Threads

    Lecture

    How has the amazing diversity of plants and animals evolved? What can fossils, butterflies, and stickleback fish tell us about the deep common ancestry of all living forms?

  • Sexual Evolution: From X to Y

    Sexual Evolution: From X to Y

    Lecture

    (1 hr 28 sec) Dr. Page explains how successive inversions and deletions of the Y chromosome during mammalian evolution have reduced it to its present form—small and sparsely populated with genes.

  • The Meaning of Sex: Genes and Gender

    The Meaning of Sex: Genes and Gender

    Lecture

    Four talks focus on sex determination—the molecular and genetic mechanisms that determine whether an organism will be male, female or a hermaphrodite.

  • Emerging Infections: How Epidemics Arise

    Emerging Infections: How Epidemics Arise

    Lecture

    (59 min) Dr. Ganem analyses the complex causes of epidemics—how changes in the environment and in human social behavior can give rise to new infectious diseases.