Identify the different colors you observe after complete diffusion has occurred. Because the two colors from the ends merge with yellow in the center, five colors result- red, orange, yellow, green , blue, representing the five morphogens mentioned above. Determine from your data the rate of migration of each individual dye. Graph the rate of migration of the individual dyes overtime. Identify the dependent and independent variable in the above graph.
Cells identify their relative position by use of anterior and posterior morphogens in the embryo.
Design an experiment that demonstrates the role of morphogen in differentiation in the Drosophila larvae. It may be helpful to have them look at photographs of such pictures first. The Biology Project , University of Arizona, November 8, 1996. Synergy between the Hunchback and Bicoid Morphogens is Required for Anterior Patterning in Drosophila , Simpson-Brose, Treisman, Despain, 1994. Cell , Vol.78, 855-865, September 9, 1994.