But the experimental practice of X-raying alone could not open the path to a material characterization of genes as units of heredity.
The development of molecular biology began with the definitive identification of DNA as the material basis of genes in the late 1940s and early 1950s.
But to them, too, the material character of genes and the way these putative entities gave rise to primary products remained elusive and beyond the reach of their own biochemical analysis.
The interactive complexity of those movements have not yet been brought into focus because of the constraints of earlier cognitive trails established in looking for isolated technical and material signs of genes, artifacts, and other proxies and markers, and because the role of social cognition has not yet been fully understood and included in the complex.
Transposons have contributed greatly, not only to shaping the genomic landscape, but also to the coding material of endogenous genes, for instance by giving rise to chimeric proteins (reviewed in [ 5]).
Hence, the consequences of introgression of farm genetic material on gene expression depended on population-specific genetic architectures.
By altering the genetic material of cells, gene therapy may correct, or one day cure, the specific disease pathophysiology.
Loss of genetic material, loss of gene functions are one of the major mechanisms of specialization already observed in many other pathogens, such as Yersinia, Helicobacter, Salmonella, Pseudomonas [15], [22], [23].
Gene chips, also called DNA chips or microarrays, are pieces of glass or other material containing thousands of genes or gene fragments.
Thus there is no genetic material or sequence of genes that all and only members of the species Drosophila melanogaster possess, and likewise for all other species.
