In this article we will discuss about the sex determination in humans. The problem of sex determination is an interesting one for which many theories have been advanced but the fundamental differences in sex are not so great as might be imagined, as the organs of the one are often represented as rudiments in the other, the differentiation coming about [...]
Let us make an in-depth study of the gene therapy principles for neoplastic disorders and infectious diseases. Cancer Gene Therapies: Many different approaches can be used for cancer gene therapy (see Culver and Blaese, 1994 and Table 23.6) and, in marked contrast to the few gene therapy trials for inherited disorders, numerous cancer gene therapy trials are currently being conducted [...]
In this article we will discuss about the role of environment in changing the form and degree of expression of some genes resulting in a corresponding change in the phenotype. Penetrance and Expressivity: The presence of a gene does not always bear an absolute relationship with the appearance or absence of a trait. In the ABO blood group system, the [...]