Chapter 26, Problem 9CONQ

Summary Introduction

To review:

The similarities and differences between the processes of pre-establishment of the gradient of morphogens in oocyte and the process of secretion of morphogens by the cell during latter developmental stages.

Introduction:

Morphogens are present in oocytes, having a pre-established gradient. In the embryo, the gradient is created by the cells that secrete morphogens. Morphogens provide positional information to the cells which, helps in the formation of various structures in the body of Drosophila.