Ricerc@Sapienza

The paper analyzes the early theory building process of Thomas Hunt Morgan (1866-1945) from the 1910s to the 1930s and the introduction of the invisible gene as a main explanatory unit of heredity. Morgan's work marks the transition between two different styles of thought. In the early 1900s, he shifted from an embryological study of the development of the organism to a study of the mechanism of genetic inheritance and gene action. According to his contemporaries as well as to historiography, Morgan separated genetics from embryology, and the gene from the whole organism.

In the wake of multiple observations arising from diverse corners of physiological and molecular genetics, the onslaught of
epigenetic changes, gene x environment interaction, under current appearances requires rendition for purposes of displaying
both performance augmentation, amelioration of structural-functional impairment and the promotion of resilience manifested
by the lasting health benefits that arise from regular and consistent physical exercise. The notion that individuals, who