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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.

  • Intracytoplasmic Sperm Injection (ICSI)

    Intracytoplasmic Sperm Injection (ICSI)

    Clip

    (1 min 16 sec) Video microscopy demonstrating how sperm from an infertile male can be injected into a female egg.