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Medical histories
The first medical interventions were often individualized but ineffective, because doctors lacked an understanding of disease biology. As medicine became more scientific, physicians started grouping patients by disease. Now, genetic insights let doctors consider their patients' unique make-up when prescribing treatments.
Journal Article
Genetic contributions to variation in human stature in prehistoric Europe
The relative contributions of genetics and environment to temporal and geographic variation in human height remain largely unknown. Ancient DNA has identified changes in genetic ancestry over time, but it is not clear whether those changes in ancestry are associated with changes in height. Here, we directly test whether changes over the past 38,000 y in European height predicted using DNA from 1,071 ancient individuals are consistent with changes observed in 1,159 skeletal remains from comparable populations. We show that the observed decrease in height between the Early Upper Paleolithic and the Mesolithic is qualitatively predicted by genetics. Similarly, both skeletal and genetic height remained constant between the Mesolithic and Neolithic and increased between the Neolithic and Bronze Age. Sitting height changes much less than standing height—consistent with genetic predictions—although genetics predicts a small post-Neolithic increase that is not observed in skeletal remains. Geographic variation in stature is also qualitatively consistent with genetic predictions, particularly with respect to latitude. Finally, we hypothesize that an observed decrease in genetic heel bone mineral density in the Neolithic reflects adaptation to the decreased mobility indicated by decreased femoral bending strength. This study provides a model for interpreting phenotypic changes predicted from ancient DNA and demonstrates how they can be combined with phenotypic measurements to understand the relative contribution of genetic and developmentally plastic responses to environmental change.
Journal Article
Genetics : unlocking the secrets of life
\"This title presents the history of genetics. Vivid text details how early studies of heredity and genes led to our modern understanding of how DNA works. It also puts a spotlight on the brilliant scientists who made these advances possible.\"--Publisher's website.
Book
Genetic Witness
When DNA profiling was first introduced into the American legal system in 1987, it was heralded as a technology that would revolutionize law enforcement. As an investigative tool, it has lived up to much of this hype-it is regularly used to track down unknown criminals, put murderers and rapists behind bars, and exonerate the innocent.Yet, this promise took ten turbulent years to be fulfilled. In Genetic Witness, Jay D. Aronson uncovers the dramatic early history of DNA profiling that has been obscured by the technique's recent success. He demonstrates that robust quality control and quality assurance measures were initially nonexistent, interpretation of test results was based more on assumption than empirical evidence, and the technique was susceptible to error at every stage. Most of these issues came to light only through defense challenges to what prosecutors claimed to be an infallible technology. Although this process was fraught with controversy, inefficiency, and personal antagonism, the quality of DNA evidence improved dramatically as a result. Aronson argues, however, that the dream of a perfect identification technology remains unrealized.
eBook
Moments of truth in genetic medicine
Genetic research increasingly dominates medical thought and practice in the United States and in many other industrialized nations. Susan Lindee's original study explores the institutions, disciplines, and ideas that initiated the reconfiguration of genetic medicine from a marginal field in the mid-1950s to a core research frontier of biomedicine.
Tracing the work of geneticists and other experts in identifying and classifying disease during the explosive period between 1950 and 1980, Lindee identifies the individual \"moments of truth\" that moved the field away from its eugenic past to the center of a new world view in which nearly all disease is understood to be fundamentally genetic. She suggests that these moments of truth were experienced not only by scientists but also by those who had familial, intimate, emotional knowledge of hereditary disease: patients, family members, and research subjects.
Focusing on benchmarks in the field—such as the rise of neonatal testing in the 1960s, genetic studies of unique human populations such as the Amish, the development of human cytogenetics and human behavioral genetics, and the efforts to find genes for rare diseases such as familial dysautonomia—she tracks the emergence of a biomedical consensus that nearly all disease is genetic disease.
Using the success of this field as a point of entry, Lindee chronicles both the production of knowledge in biomedicine and changes in the cultural meaning of the body in the late twentieth century. She suggests that scientific knowledge is a community project that is shaped directly by people in many different social and professional locations. The power to experience and report scientific truth may be much more dispersed than it sometimes appears, because people know things about their own bodies, and their knowledge has often been incorporated into the technical infrastructure of genomic medicine.
Lindee's pathbreaking study shows the interdependence of technical and social parameters in contemporary biomedicine.
eBook
Genetics without genes? The centrality of genetic markers in livestock genetics and genomics
In this paper, rather than focusing on genes as an organising concept around which historical considerations of theory and practice in genetics are elucidated, we place genetic markers at the heart of our analysis. This reflects their central role in the subject of our account, livestock genetics concerning the domesticated pig, Sus scrofa. We define a genetic marker as a (usually material) element existing in different forms in the genome, that can be identified and mapped using a variety (and often combination) of quantitative, classical and molecular genetic techniques. The conjugation of pig genome researchers around the common object of the marker from the early-1990s allowed the distinctive theories and approaches of quantitative and molecular genetics concerning the size and distribution of gene effects to align (but never fully integrate) in projects to populate genome maps. Critical to this was the nature of markers as ontologically inert, internally heterogeneous and relational. Though genes as an organising and categorising principle remained important, the particular concatenation of limitations, opportunities, and intended research goals of the pig genetics community, meant that a progressively stronger focus on the identification and mapping of markers rather than genes per se became a hallmark of the community. We therefore detail a different way of doing genetics to more gene-centred accounts. By doing so, we reveal the presence of practices, concepts and communities that would otherwise be hidden.
Journal Article