In this article, the changing pattern of processes of differentiation will be shown in examples taken from the development of living organisms. Hemoglobins: How specific genes change their activity during development is illustrated by the composition of hemoglobins in man. The hemoglobin in adult humans is in the form of composite molecules consisting of four units (polypeptides), two of which [...]
In this article we will discuss about the control of reactive ability of tissues by the genotype. While the initial step in the differentiation of cells is made by the cytoplasm, it can be shown that the final result cannot be achieved without the involvement of hereditary factors, the nuclear genes. This is true in particular in the case of [...]
In this article we will discuss about:- 1. The Problem of Reversibility of Differentiation 2. Chemical Substances as Means of Controlling Differentiation 3. Epithelial-Mesenchymal Interactions. The Problem of Reversibility of Differentiation: Differentiation may be reversible to a certain extent. The morphological and physiological peculiarities of tissues require for their maintenance the environment which surrounds them in the normal organism. Except [...]