Whereas old dependency theory was Marxist in presentation, but nationalist in orientation, seeking to combine a theory of class struggle with a nationalist âthird worldistâ ideology, the new dependency theory is institutionalist in its analysis and political orientation.
Griffith concluded that the type II-R had been transformed into the lethal III-S strain by a transforming principle that was somehow part of the dead III-S strain bacteria. Today, we know that the transforming principle Griffith observed was the DNA of the III-s strain bacteria. While the bacteria had been killed, the DNA had survived the heating process and was taken up by the II-R strain bacteria. The III-S strain DNA contains the genes that form the protective polysaccharide capsule.
Bacterial Transformation. Here's what Griffith did and what he observed 1  -. He injected mice with the Type II-R strain and the mice survived. 2  He injected mice with the Type III-S strain and the mice died.3  He heat killed the Type III-S strain and then injected the mice with the dead bacteria and the mice lived.rederick Griffith was searching for a vaccine against Spanish flu and was using two strains of Streptococcus pneumoniae bacteria. During the process he discovered that gene transfer took place between two different bacterial strains.