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  • 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.

  • Sex and Death: Too Much of a Good Thing

    Sex and Death: Too Much of a Good Thing

    Lecture

    (59 min 6 sec) Having too many chromosomes can lead to too much gene expression. Dr. Meyer explains how the gene that controls dosage compensation in C. elegans works.

  • Hermaphrodites: The Safer Sex

    Hermaphrodites: The Safer Sex

    Lecture

    (56 min 32 sec) Dr. Barbara Meyer explains the value of studying model organisms and introduces the nematode C. elegans.

  • Deciphering the Language of Sex

    Deciphering the Language of Sex

    Lecture

    (58 min 51 sec) Is it a boy or a girl? Dr. David Page looks at how we define male and female and summarizes the development of human sex characteristics.

  • 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.