The study of genetics and molecular biology are but one aspect of the Singularity. The main argument or point here is that our technological advances in the areas of biology and genetics are allowing us to do more with the human body than was once thought possible. Scientists are able to create medicines and treatments for diseases and ailments based on the genetic makeup of those viruses or diseases. We are effectively able to "activate" and "turn off" different genetic markers to help basically phase out certain ailments within the human body.
Who knows what our research will bring, and where we can go next? "Nanomedicine researcher Robert Freitas estimates that eliminating 50% of medically preventable conditions would extend human life expectancy to 150 years. If we were able to eliminate 99% of naturally occurring medical problems, we'd live to be more than 1000 years old" (Kurzweil, 40). Medicine is and always has been about improving the quality of life of the patient. If, through genetics, doctors and scientists were able, not only to improve the quality of life, but completely do away with any and all ailments that might have an impact on one's quality of life, there is no telling how humanity might be affected. Life expectancy would greatly increase. Global population would exponentially increase. Humanity's growth would impact global agriculture. Economies and governments would change. Laws would have to be made or altered. While there are many obvious benefits, humanity would have to be careful, because there are also likely to be hidden detriments behind increased biological and genetic advancements.