Quotes About Lamarckism

A hurt mammal never forgets. Epigenetic theory suggests an almost Lamarckian transfer down the generations; some genes are activated by experiences, others are not. Genes, language, history: what it all meant in actual practice was that fear passed down through the years, altering organisms for generation after generation, thus altering the species. Fear, an evolutionary force.

To this day, in spite of great efforts, Lamarckism has failed to produce conclusive evidence to prove that acquired characters are transmitted to the offspring; and it seems fairly certain that, while experience does affect heredity, it does not do so in this simple and direct way.

All sorts of changes in cellular machinery have shown up that have nothing to do with the sequence of DNA but still have profound, and heritable, impacts for generations to come. For example, malnourished rats give birth to undersized pups that, even if well fed, grow up to give birth to undersized pups. Which means, among other things, that poor old Lamarck was right—at least some acquired traits can be passed down.