TLS Online TPP Program

#Question id: 7192


The following are statements regarding the development and maintenance of anterior and posterior compartments in each segment of Drosophila. Which of the following is correct?

#Unit 5. Developmental Biology
  1. Expression of wingless and engrailed is activated by pair-rule genes.
  2. Continued expression of wingless and engrailed is maintained by interaction between the cells expressing frizzled and Wingless proteins.
  3. Hedgehog is expressed in wingless expressing cells and forms short range gradient.
  4. Engrailed is a secretory factor and binds with the patched receptor of the wingless expressing cells.