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  • Breeding Corn from Teosinte

    Breeding Corn from Teosinte


    (52 sec) Corn was originally bred from the teosinte plant by native Mexican farmers. The morphologies of modern-day corn and teosinte plants are compared to illustrate how artificial selection can bring about dramatic changes in plants.

  • Popped Secret: The Mysterious Origin of Corn

    Popped Secret: The Mysterious Origin of Corn

    Short Films

    (17 min 51 sec) Where did corn come from? Genetic and archeological data point to what may seem like an unlikely ancestor: a wild Mexican grass called teosinte. Also available in Spanish.

  • Film Guide for Popped Secret: The Mysterious Origin of Corn

    Film Guide for Popped Secret: The Mysterious Origin of Corn

    Film Guides

    The following classroom-ready resources complement the film Popped Secret: The Mysterious Origin of Corn, which tells the story of how geneticists and archaeologists have come together to determine how and where corn was domesticated nearly 9,000 years ago. Also available in Spanish.

  • Dating Corn Domestication Using Carbon Isotopes

    Dating Corn Domestication Using Carbon Isotopes

    Data Points

    To study the change in diet as human populations changed lifestyles from hunter-gatherers to agriculturalists, scientists measured carbon isotopes in the collagen tissues of human skeletons from North America.

  • Popped Secret Film with Quiz

    Popped Secret Film with Quiz

    Interactive Videos

    (17 min 51 sec) Embedded quiz modules test students’ understanding as they watch a short film on the evolutionary origins of corn.

  • Stalking the Genetic Basis of a Trait

    Stalking the Genetic Basis of a Trait


    In this activity students analyze data on the expression of the tb1 gene and use it to formulate an explanation as to how a specific difference in the corn version of the gene explains the phenotype of less branching.

  • Selective Breeding in Maize

    Selective Breeding in Maize

    Data Points

    Researchers performed the longest-running, controlled artificial selection experiment to study whether they could increase the protein concentration of maize (corn) by selective breeding.

  • Bat Echolocation

    Bat Echolocation

    Data Points

    In this study, researchers tested whether bats change their behavior while hunting based on feedback from echolocation.

  • The Teosinte Hypothesis

    The Teosinte Hypothesis


    In this lesson, students work through the mathematics and concepts behind George Beadle’s claim that teosinte is the wild ancestor of maize. Also available in Spanish.

  • Sorting Seashells

    Sorting Seashells

    Click & Learn

    Explore principles of taxonomy by sorting seashells according to their morphological characteristics and constructing an evolutionary tree.

  • Getting a list of ALL BioInteractive Resources

    Here's a tip on a secret way to get a listing of all current BioInteractive resource pages. This used to be a page that only BioInteractive staff used, but we had enough requests for a similar...

  • Award-Winning Resources

    The BioInteractive website and educational resources have won many awards over the years. They are listed below with links to the relevant resources. BioInteractive website 2018 MERLOT Awards...

  • The BioInteractive Team

    The BioInteractive Team

    HHMI’s BioInteractive website provides a wide array of free science education resources for the classroom. They are produced by a core team of scientist educators, graphic artists, video producers, and outreach professionals working in close collaboration with science teachers and undergraduate educators, scientists, film producers, animators, and programmers #mini-panel-biointeractive_summary h2 { display: none; }

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