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    Roux's mosaic determination theory is not refuted by Drie... — Carmelics
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    Home/Bioethics
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    Roux's mosaic determination theory is not refuted by Driesch's cell separation experiments in simpler organisms

    Bioethics
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    1 reason for
    2 reasons against

    Reasons For

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    Reason for
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    • 1.Simpler organisms need the capacity to regenerate when injured
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    • 2.To support regeneration, mosaic determination must not yet have occurred in early development of simpler organisms
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    • 3.Each cell retains a 'reserve idioplasm' that provides backup determination sufficient to form a whole organism
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    Reasons Against

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    Reason against 1 of 2
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    • 1.Driesch's sea urchin blastomere experiments demonstrated totipotency across multiple cell divisions, not merely in earliest cleavage stages where 'reserve idioplasm' would plausibly remain intact.
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    • 2.Roux's own mosaic framework predicts that reserve idioplasm must be progressively consumed during determination, making its persistence through later divisions logically inconsistent with the theory's core commitments.
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    • 3.Ad hoc appeals to reserve idioplasm were not derived from independent empirical evidence but introduced solely to neutralize Driesch's falsifying data, violating the methodological norms Roux himself endorsed.
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    Reason against 2 of 2
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    • 1.The 'simpler organisms regenerate, therefore mosaic rules are suspended' argument concedes that mosaic determination is not a universal developmental mechanism, undermining its claimed theoretical scope.
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    • 2.Hans Spemann's organizer experiments in vertebrates demonstrated equivalent regulative capacity in organisms Roux's framework classified as paradigmatic mosaic systems, collapsing the simple/complex organism distinction the defense relies upon.
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    Bioethics

    Related

    Ad hoc appeals to reserve idioplasm were not derived from independent empirical ...Driesch's sea urchin blastomere experiments demonstrated totipotency across mult...Each cell retains a 'reserve idioplasm' that provides backup determination suffi...Hans Spemann's organizer experiments in vertebrates demonstrated equivalent regu...
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    Roux's own mosaic framework predicts that reserve idioplasm must be progressivel...Simpler organisms need the capacity to regenerate when injuredThe 'simpler organisms regenerate, therefore mosaic rules are suspended' argumen...The nucleus retains the capacity to adapt, particularly in simpler organismsTo support regeneration, mosaic determination must not yet have occurred in earl...

    Similar

    To support regeneration, mosaic determination must not yet have occurr...79%Individual cases are mosaics made up of recurring symptoms that can be...69%It is very difficult to assess whether a given biological system is th...67%The causal condition for species membership may be disjunctive, fulfil...66%

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    SEP: theories-biological-development
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    It might seem that Roux would have had to acknowledge the superiority of Driesch’s approach, since Driesch had actually separated the cells. But no. Instead Roux countered with an additional hypothesis. The nucleus retains the capacity to adapt, especially in simpler organisms. They need the capacity to regenerate when injured, and therefore the mosaic determination simply has not occurred yet. Each cell retains a “reserve idioplasm”, he argued, and this provides the necessary backup determinati
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    Details

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    claim
    Perspectives
    3 (1 for, 2 against)
    Edits
    1 edit