Acquired Traits Revisited
Author(s) -
William D. Stansfield
Publication year - 2011
Publication title -
the american biology teacher
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.277
H-Index - 30
eISSN - 1938-4211
pISSN - 0002-7685
DOI - 10.1525/abt.2011.73.2.6
Subject(s) - heredity , biology , context (archaeology) , inheritance (genetic algorithm) , conceptual change , evolutionary biology , offspring , epistemology , cognitive science , genetics , psychology , philosophy , pregnancy , paleontology , gene
Most biology texts villify Lamarck's concept of “inheritance of acquired characters” and leave the impression that all acquired characters are never transmitted to offspring. However, recent research indicates that this is not true! Some “acquired” traits are inherited. I profile some of these striking cases and their importance for evolution and for understanding a broader epigenetic context for heredity and ontogeny (the emerging field of “evo-devo”). Further, I discuss how such cases, even considered as exceptions, contribute to understanding the nature of science, both the role of general rules in biology and the occurrence of conceptual change, or paradigm shifts.
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