According to advocates and authors from different disciplines interested in biomedicine, biomedical research in genetics and genomics has the potential to transform medicine, the economy, society, and humanity as a whole. Believing in this potential, biomedical scientists produce knowledge and participate in the decisions concerning the orientation of this research and its applications. Through a qualitative analysis of scientists' practice-related discourse, we identified three main sources of complexity in their involvement in the "commercial revolution" of science. First, scientists insist on (...) the existence of different types of university-industry relationships. Second, they urge that the multiple realities of genetic and genomic research be acknowledged. Third, they present themselves as individuals in a diverse scientific community, each with a unique position in this commercial revolution. This paper draws attention to these complexities because they must be considered when engaging in a study of genetics and genomics advances from a research ethics perspective. (shrink)