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  • Leptin Feedback Control System

    Leptin Feedback Control System

    Animations

    (1 min 1 sec) Demonstrates how changes in the amount of fat tissue lead to changes in leptin levels and thus changes in appetite.

  • How a Heart Attack Occurs

    How a Heart Attack Occurs

    Animations

    (37 sec) A 3-D animation that shows how plaques form in a blood vessel, leading to blockage and a heart attack.

  • The Fate of Fat

    The Fate of Fat

    Animations

    (2 min 8 sec) An overview of how dietary fat gets digested, packaged, and sent to various tissues for storage or energy.

  • Body Mass Index (BMI)

    Body Mass Index (BMI)

    Animations

    (1 min 23 sec) Comparison of the change in BMI for a given height and varying weights.

  • PPAR-gamma Activation in the Fat Cell

    PPAR-gamma Activation in the Fat Cell

    Animations

    (2 min 49 sec) The PPAR-gamma receptor activates certain genes in a fat cell, resulting in the storage of fat and changes in hormone levels.

  • Sickle Cell Anemia

    Sickle Cell Anemia

    Animations

    (1 min) Sickle cell anemia is a genetic disease that affects hemoglobin.

  • X Inactivation

    X Inactivation

    Animations

    (55 sec) This animation shows how the random deactivation of one of the X chromosomes in a pair can lead to a mozaicism in the expression genes. 

  • Test Your Knowledge of Sex Determination

    Test Your Knowledge of Sex Determination

    Click & Learn

    Answer the questions in this online quiz to test your knowledge of what determines the sex of a human, a fruit fly, and a snapping turtle.

  • Clonal vs Sexual Reproduction

    Clonal vs Sexual Reproduction

    Clips

    (8 min 56 sec) What does a stack of fruits and vegetables have to do with the theoretical advantages of sexual reproduction? Find out in this demonstration with student audience members and Dr. David Page.

  • Meiosis

    Meiosis

    Animations

    (5 min 53 sec) This animation shows how meiosis, the form of cell division unique to egg and sperm production, can give rise to sperm that carry either an X or a Y chromosome.  

  • Are You a Morning or an Evening Person?

    Are You a Morning or an Evening Person?

    Click & Learn

    This survey, developed by Horne and Ostberg, will let you determine if you are a morning or an evening person.

  • Transgenic Fly Virtual Lab

    Transgenic Fly Virtual Lab

    Virtual Labs

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

  • The Drosophila Molecular Clock Model

    The Drosophila Molecular Clock Model

    Animations

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

  • Measuring Circadian Activity in Drosophila

    Measuring Circadian Activity in Drosophila

    Animations

    (2 min 3 sec) This animation series shows four experiments that compare the activity patterns of a wild-type fly keeping a normal schedule with those of a mutant fly apparently following a 19-hour internal clock.

  • The Mammalian Molecular Clock Model

    The Mammalian Molecular Clock Model

    Animations

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

  • Size Analogies of Bacteria and Viruses

    Size Analogies of Bacteria and Viruses

    Clips

    (1 min 44 sec) Dr. Finlay and Dr. Richard Ganem use physical analogies to compare the size of bacteria and viruses relative to a standard mammalian cell.

  • Penicillin acting on bacteria

    Penicillin acting on bacteria

    Clips

    (34 sec) Penicillin, as shown in this video, causes the cell walls of bacteria to rupture.

  • E. coli Infection Strategy

    E. coli Infection Strategy

    Animations

    (2 min 53 sec) Watch this animation to see the molecular tricks that an infectious strain of Escherichia coli uses to infect your gut.

  • Bacterial Conjugation

    Bacterial Conjugation

    Animations

    (23 sec) Bacteria can transfer genetic material, and thus drug resistance, to other bacteria via conjugation.

  • Recombination of Viral Genome

    Recombination of Viral Genome

    Animations

    (3 min 5 sec) When two different strains of influenza infect a single cell, their genetic material can mix freely, resulting in a new third strain of influenza.

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