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"The real point is control": the reception of Barbara McClintock's controlling elements
1George Washington University, Washington, DC.
Journal of the History of Biology
|October 20, 2001
Summary
Barbara McClintock's discovery of genetic transposition was accepted early, contrary to popular belief. Her broader theories on genetic control, however, remained controversial until later.
Area of Science:
- Genetics
- Molecular Biology
- History of Science
Background:
- The prevailing narrative suggests Barbara McClintock faced significant disbelief following her discovery of genetic transposition in the 1940s.
- This narrative is challenged by new evidence indicating immediate acceptance of transposition by maize and bacterial geneticists.
Discussion:
- McClintock's broader hypothesis on movable elements as a genetic control system for development and differentiation was highly speculative and not widely accepted.
- The introduction of Jacob and Monod's operon model further overshadowed her controller argument.
Key Insights:
- Archival documents and close readings reveal transposition was recognized as a classic discovery by the late 1950s.
- McClintock's Nobel Prize in 1983 may have been a bittersweet validation, acknowledging transposition but not her speculative control theories.
Outlook:
- Re-evaluating McClintock's work offers insights into the intellectual and social history of American genetics.
- This reassessment also impacts the historiography of women in science and the acceptance of unconventional scientific theories.