All Subjects
      All Types




        Permitted Use

        Stream Only

        Part of NOVA
        136 Favorites

        Regulating Genes

        This interactive activity from NOVA examines how mutations in different regions of an organism's DNA affect gene expression—whether genes are turned on or off during the organism's development. An animated model depicts two DNA segments in the nucleus of a fertilized egg. Each segment contains a coding gene, enhancers in the noncoding regulatory region, and other DNA not associated with the gene. As the egg develops, each cell produces its own proteins. Whether and where these proteins bind to the DNA determines gene expression. Mutations can change how receptors in each of the regions permit or prevent such binding. This, in turn, influences which traits are displayed.

        Funder: Funding for NOVA is provided by ExxonMobil, Pacific Life, David H. Koch, the Howard Hughes Medical Institute, the Corporation for Public Broadcasting, and public television viewers.

        You must be logged in to use this feature

        Need an account?
        Register Now