4. The repercussions of such a mindset could possibly result in unethical treatment and thus biases against people. Should people have access to such information, insurance companies would probably use this to their advantage. People would believe in inherent superiority since they would possess so-called "superior" genes. Everyone would become so obsessed with the relationship of DNA and traits that they'd base all of their decisions off it, even marriage.
5. The significance of such discoveries leads to the potential for further medical advancement. DNA not only enables us to understand the mechanism of trait expression, it also enlightens us on the genetic basis for diseases. Through extensive research and experimentation, it is possible to find a correlation between genes and certain diseases in your family history. By locating these genes, they can then be experimented with different drugs to suppress the expression of diseases. Knowledge of genes also makes possible gene therapy, genetic engineering, stem cell therapy and the like.