Problem:
Question 1: Why do mutations in some segment polarity genes result in segments that are mirror images of other segments?
Question 2: What did mosaic analysis tell us about the role of sevenless in the R7 cell and boss in the R8 cell?
Question 3: Describe the role of Maternal Affect Genes, Gap Genes, and Pair-rule genes in the anterior-posterior patterning of the Drosophila embryo.
Question 4: What is a morphogen? How do morphogens affect patterning of Drosophila segments?
Question 5: What are the common features of signaling pathways?
I dont need long explanation. Just few sentences of expanation.