Each object was chosen specifically because it had some relation to the original molecules or genes. For example, the pirate was chosen to represent pitx-2 because the first couple of letters remind the viewer of the gene. These objects were placed on a colorful background that clearly depicted the left and right sides of the embryo. In this way the viewer could make memory schemas associated with the left and right sides of the embryo.
Regulation is an important theme stressed through out the semester.
Blocking of the different molecules and genes was also shown. This was done to clearly show the action of certain molecules stopping, or blocking, the action of another molecule or gene. This is important for the student to know because without blocking organs could form on the wrong side of the body. Blocking is essential for proper development to occur. Gene expression leads to the development of the left and right axes.