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    The urn model of genetic drift has limited explanatory po... — Carmelics
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    The urn model of genetic drift has limited explanatory power because it lacks an analogue for reproduction.

    Causation
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    2 reasons for
    1 reason against

    Reasons For

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    Reason for 1 of 2
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    • 1.Mechanistic explanation requires that models preserve causally relevant process structure, not merely input-output statistics (Machamer, Darden, Craver 2000).
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    • 2.Variance in offspring number (Vw) is a distinct causal contributor to allele frequency change, irreducible to sampling from a fixed population.
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    • 3.An urn model that omits reproductive variance cannot represent the causal mechanism generating drift, only a statistical surrogate of its outcome.
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    Reason for 2 of 2
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    • 1.Effective population size (Ne) compensates mathematically for missing reproductive structure, but compensation masks rather than explains the underlying causal factors.
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    • 2.Philosophers of biology like Matthen and Ariew argue that drift explanations must cite population-level causal processes, not merely probabilistic redescriptions.
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    • 3.A model that requires external correction factors to approximate biological reality has explanatory gaps where those corrections do causal work the model cannot.
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    Reasons Against

    1 perspective
    Reason against
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    • 1.Balls in the urn model do not produce offspring.
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    • 2.Biological populations reproduce, and offspring number can vary, which affects allele frequency change.
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    Causation

    Related

    A model that requires external correction factors to approximate biological real...An urn model that omits reproductive variance cannot represent the causal mechan...Balls in the urn model do not produce offspring.Biological populations reproduce, and offspring number can vary, which affects a...
    +4 moreShow less
    Effective population size (Ne) compensates mathematically for missing reproducti...Mechanistic explanation requires that models preserve causally relevant process ...Philosophers of biology like Matthen and Ariew argue that drift explanations mus...Variance in offspring number (Vw) is a distinct causal contributor to allele fre...

    Similar

    Balls in the urn model do not produce offspring.79%Natural selection and genetic drift can be conceptually distinguished ...76%Disproving drift as the cause of gene frequency fluctuations does not ...75%Reisman and Forber's experiment may not demonstrate that drift is a ca...75%

    Source

    AI-extracted1/3 agreementValid
    SEP: genetic-drift
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    A better illustration of drift has its origins in Theodosius Dobzhansky’s (1937) discussion of Dubinin and Romaschoff’s (1932) model, which asks us to imagine an urn filled with different colored balls. If the balls are drawn from the urn without respect to color, e.g., by a person drawing balls while blindfolded, then the balls are being indiscriminately sampled (unlike discriminate sampling, where someone deliberately tries to pick balls of a certain color). If a large sample of balls is taken
    Extraction notes

    Validity: Extracted via Max plan + API grounding/validity checks

    Details

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