In the modern era, commercial genetic testing is advancing at a breakneck pace, promising insights into everything from our ancestry to potential health risks. However, this rapid advancement prompts a crucial question: are we ready to harness these technologies responsibly? A new book, What We Inherit: How New Technologies and Old Myths Are Shaping Our Genomic Future, by authors Daphne O. Martschenko and Sam Trejo, delves into whether society is truly prepared for the implications of these developments. This article unpacks the complexities of genetic tests, the myths associated with them, and the broader impacts these tests could have on human diversity.
The Dichotomy in Genetic Research
Martschenko and Trejo approach the topic of social genomics from different angles yet share a common goal: improving our world through their research. Martschenko argues that genetic data has often been used to perpetuate social inequalities and that such data isn’t necessary to solve pressing societal issues. In contrast, Trejo highlights the benefits of genetic information, advocating for its collection and responsible use. Their collaborative work addresses the myths that genetics can definitively dictate one’s destiny or that racial categorizations can be cleanly defined by DNA—both misconceptions that fail to acknowledge the intricate dance between genes and the environment.
Understanding Polygenic Scores
A significant aspect of the book is the examination of polygenic scores, which predict traits based on multiple genetic factors. These scores have some predictive power, but they are inherently probabilistic and often less accurate for individuals of non-European descent. The authors advocate for stringent regulation of these scores to prevent misuse, warning that their application could subtly reinforce new forms of inequality.
As polygenic scores become commercially available, some companies are marketing them for determining traits like intelligence or height, despite the scientific limitations and inherent risks. Left unchecked, the use of such embryonic screening could stifle genetic diversity and deepen societal divides, as those with greater financial means access these technologies first.
The Ethical Implications and Future
In some countries, such as the UK and Israel, the regulation of polygenic embryo selections is more stringent, whereas the U.S. lags behind, often treating polygenic scores like dietary supplements—poorly regulated and lightly scrutinized. This lack of oversight risks allowing affluent families to monopolize potential genetic ‘advantages’, fostering a new type of inequality.
Key Takeaways
-
Misunderstandings and Myths: Many interpret genetics through a lens of misconceptions, viewing DNA as deterministic or allowing false notions of racial categorization to persist.
-
Polygenic Scores’ Limitations: Given their probabilistic nature and inaccuracy across diverse ancestries, polygenic scores require careful and strict regulation.
-
Regulation Needs: The current absence of rigorous oversight in genetic testing presents ethical challenges and risks heightening inequalities if genetic advantages exacerbate existing social divides.
-
Social Impact: Without regulation, genetic testing’s unbridled progression could erode genetic diversity, leading to societal uniformity shaped by misconceived ideals.
In conclusion, while commercial genetic testing has the potential to be transformative, Martschenko and Trejo stress the importance of adopting an informed and equitable approach. They emphasize the need for robust education and regulation to ensure these technologies advance without unintended social consequences.