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    Theorizing and representational practices in classical genetics

    Vorms, Marion (2013) Theorizing and representational practices in classical genetics. Biological Theory 7 (4), pp. 311-324. ISSN 1555-5542.

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    Abstract

    In this paper, I wish to challenge theory-biased approaches to scientific knowledge, by arguing for a study of theorizing, as a cognitive activity, rather than of theories, as abstract structures independent from the agents’ understanding of them. Such a study implies taking into account scientists’ reasoning processes, and their representational practices. Here, I analyze the representational practices of geneticists in the 1910s, as a means of shedding light on the content of classical genetics. Most philosophical accounts of classical genetics fail to distinguish between the purely genetic, or Mendelian level, and the cytological one. I distinguish between them by characterizing them in terms of their respective associated representational practices. I then present how the two levels were articulated within Morgan’s theory of crossing-over, and I describe the representational technique of linkage mapping, which embodies the “merging” of the Mendelian and cytological levels. I propose an analysis of the mapping scheme, as a means of enlightening the conceptual articulation of Mendelian and cytological hypotheses within classical genetics. Finally, I present the respective views of three opponents to Morgan in the 1910s, who had a different understanding of the articulation of cytology and Mendelism, and entertained different views concerning the role and proper interpretation of maps. I propose to consider these diverging perspectives as instantiating what I call different “versions” of classical genetics.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): classical genetics, linkage mapping, Mendelism model, representational practices, version
    School: School of Science > Psychological Sciences
    Depositing User: Sarah Hall
    Date Deposited: 14 Jan 2016 14:11
    Last Modified: 14 Jan 2016 14:11
    URI: https://eprints.bbk.ac.uk/id/eprint/13989

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