Search Results

Showing 1-4 of 4 Resources
  • Lactose Intolerance: Fact or Fiction

    Lactose Intolerance: Fact or Fiction

    Activities

    Students evaluate and discuss several statements about lactose intolerance and evolution before and after watching the film. Also available in Spanish.

  • Modeling the Regulatory Switches of the Pitx1 Gene in Stickleback Fish

    Modeling the Regulatory Switches of the Pitx1 Gene in Stickleback Fish

    Activities

    A hands-on activity in which students interpret molecular diagrams and build physical models of eukaryotic gene regulation.

  • Teacher Guide: AP Biology

    Teacher Guide: AP Biology

    Resource Guides

    This guide correlates all the resources available on the Holiday Lectures on Science DVDs and throughout the BioInteractive.org website to specific Big Ideas, Enduring Understandings, and Essential Knowledge threads of the new AP® Biology Curriculum Framework. 

  • Pitx1 Expression

    Pitx1 Expression

    Animations

    (55 sec) In the stickleback fish, pelvic-fin reduction resulted from changes in the regulatory switch elements of the Pitx1 gene. In the marine ancestor, the Pitx1 gene is activated in the pelvic-fin region during development to generate the fin. In the pelvic-reduced stickleback, the regulatory switch that normally turns on the Pitx1 gene is either missing or non-functional.