Gradient Concept in Embryo Development | Animals | Embryology

In this article we will discuss about the concept of gradients in the development of embryo. The Dorsoventral and Anteroposterior Gradients : The phenomenon of re­gional specificity raises the question of whether the gray crescent does not contain, after all, two or even more different specific substances, responsible for the development of the head and the trunk regions (or the [...]