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  • Monkey Social Status and Immune Response

    Monkey Social Status and Immune Response

    Data Point

    Scientists studied how the dominance ranking of female rhesus macaques living in social groups affected the expression of genes linked to immune response

  • Holiday Lecture 2004 Update—Jeff Friedman

    Holiday Lecture 2004 Update—Jeff Friedman

    Clip

    (3 min 52 sec) HHMI investigator Jeff Friedman provides an update to his 2004 lectures on obesity.

  • Using DNA to Explore Lizard Phylogeny

    Using DNA to Explore Lizard Phylogeny

    Activity

    This activity supports the film The Origin of Species: Lizards in an Evolutionary Tree. Students are guided to sort the lizard species by appearance, then generate a phylogenetic tree using the lizards’ DNA sequences to evaluate whether species that appear similar are closely related to each other.

  • The Origin of Species: Lizards in an Evolutionary Tree

    The Origin of Species: Lizards in an Evolutionary Tree

    Short Film

    (17 min 45 sec) In the Caribbean islands, adaptation to several common habitats has led to a large adaptive radiation with interesting examples of convergent evolution. Also available in Spanish.

  • Mutant mice with crossed excitation hop

    Mutant mice with crossed excitation hop

    Clip

    (1 min 18 sec) Kangaroo-like hopping when spinal cord excitatory interneurons cross the midline to stimulate both sides.

  • Transgenic Fly Virtual Lab

    Transgenic Fly Virtual Lab

    Virtual Lab

    The lab will familiarize you with the science and techniques used to make transgenic flies to study circadian rhythms.

  • Clockwork Genes: Discoveries in Biological Time

    Clockwork Genes: Discoveries in Biological Time

    Lecture

    Four lectures highlight the research of two scientists who have made groundbreaking discoveries elucidating the molecular basis of circadian clocks—the internal timekeepers that govern fluctuations in behavior and physiology on a 24-hour cycle.

  • The Drosophila Molecular Clock Model

    The Drosophila Molecular Clock Model

    Animation

    (7 min 35 sec) Watch these animations display the dynamic orchestration of the molecular events of the Drosophila biological clock.

  • The Mammalian Molecular Clock Model

    The Mammalian Molecular Clock Model

    Animation

    (3 min 41 sec) This animation shows the molecular interactions involved in the negative feedback loop responsible for circadian rhythms in mammals.

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