Research the Literature on your Own

1. How good is the color vision of a bee?  What are the spectral sensitivities of the visual pigments found in bees and how do these properties facilitate the tasks that the bees accomplish?
   
   
2. Draw a time-line and evolutionary tree showing the speciation of the major types of vertebrates, including mammals and primates.
   
   
3. Discuss the implications of X-chromosome inactivation for human genetic disease.
   
   
4. Random choices between different states of gene expression are a recurrent theme in biology.  A classic example is the lysis vs. lysogeny decision in bacteriophage lambda, a bacterial virus.  Contrast that process with the process of M vs. L visual pigment gene selection.