{ "schema": "evo-edu.notebook.reasoning_scaffold.v1", "id": "notebook.concepts.allele-frequency-change", "title": "Allele Frequency Change", "created": "2026-05-13", "updated": "2026-05-13", "status": "pilot-reviewed-scaffold", "derived_from": { "paper": "Inverse Knowledge Search over Verifiable Reasoning: Synthesizing a Scientific Encyclopedia from a Long Chains-of-Thought Knowledge Base", "groundrecall_note": "knowledgebase-lcot-sciencepedia-implications-20260513", "method_adapted": [ "Keep reviewed reasoning records separate from polished prose.", "Retrieve by concept targets and nearby reasoning, not only by title keywords.", "Expose only concise, checkable explanations rather than raw hidden chains of thought." ] }, "concept_targets": [ "allele frequency", "population genetics", "genetic drift", "natural selection", "migration", "mutation", "fixation", "loss", "Hardy-Weinberg expectation" ], "site_links": [ { "kind": "pack", "title": "Population Change", "url": "/evo/packs/population-change/" }, { "kind": "app", "title": "Allele Tracker", "url": "/apps/allele-tracker/" }, { "kind": "guide", "title": "Allele Tracker Study Guide", "url": "/apps/allele-tracker/study-guide.html" }, { "kind": "research_tool", "title": "Literature Explorer", "url": "/apps/literature-explorer/" } ], "records": [ { "id": "afc-001", "type": "definition-check", "question": "What counts as evolution in population genetics?", "answer_summary": "A population has evolved when allele frequencies change across generations. Individual organisms change during life, but they do not evolve in this population-genetic sense.", "verification_prompt": "Name the population, allele, starting frequency, later frequency, and generation interval.", "misconception_guard": "Do not describe a single organism adapting during its lifetime as allele-frequency evolution.", "didactopus_prompt_seed": "Rewrite the claim so the population, allele, and generation comparison are explicit." }, { "id": "afc-002", "type": "mechanism-contrast", "question": "How is selection different from drift?", "answer_summary": "Selection is biased by heritable differences in reproductive success. Drift is sampling change that is not directed by allele advantage.", "verification_prompt": "Compare repeated runs under the same conditions. Does the same directional pattern persist, or do outcomes vary strongly among trials?", "misconception_guard": "A directional-looking graph from one run is not enough to infer selection.", "didactopus_prompt_seed": "State one observation that supports selection and one observation that would make drift more plausible." }, { "id": "afc-003", "type": "scale-check", "question": "Why does drift matter more in small populations?", "answer_summary": "Random sampling error is larger when fewer individuals contribute to the next generation, so allele frequencies can jump, disappear, or fix more quickly.", "verification_prompt": "Run the same initial frequency with small and large population sizes and compare fixation or loss across repeated trials.", "misconception_guard": "Do not treat drift as weak selection; it is chance sampling, not preference for a trait.", "didactopus_prompt_seed": "Explain why two small-population runs with the same settings can end differently." }, { "id": "afc-004", "type": "application", "question": "What does migration change?", "answer_summary": "Migration changes allele frequencies when migrants carry allele frequencies different from the receiving population. It can homogenize populations or introduce alleles absent locally.", "verification_prompt": "Track source and recipient populations before and after migration; compare whether their frequencies moved closer together.", "misconception_guard": "Migration is not automatically evolution unless it changes heritable composition across generations.", "didactopus_prompt_seed": "Describe how the evidence would differ between migration and independent selection in both populations." }, { "id": "afc-005", "type": "source-of-variation", "question": "Why include mutation if the short-term frequency effect is small?", "answer_summary": "Mutation introduces new heritable variants. Its immediate frequency effect may be small, but it supplies variation that drift, selection, and migration can later alter.", "verification_prompt": "Identify whether the allele existed before the run and whether later mechanisms changed its frequency.", "misconception_guard": "Mutation is not the same thing as selection, and it does not need to be beneficial to enter the population.", "didactopus_prompt_seed": "Separate the source of a new allele from the later reason its frequency changed." }, { "id": "afc-006", "type": "equilibrium-baseline", "question": "Why use Hardy-Weinberg expectations?", "answer_summary": "Hardy-Weinberg expectations provide a baseline for genotype frequencies under restrictive assumptions. Deviations help learners ask which assumptions may have been violated.", "verification_prompt": "List the assumptions being used as a null model before naming the evolutionary force.", "misconception_guard": "Do not treat Hardy-Weinberg as a claim that real populations never evolve.", "didactopus_prompt_seed": "Use the baseline to frame one testable question rather than as an answer." }, { "id": "afc-007", "type": "evidence-check", "question": "What evidence is needed before claiming an allele is adaptive?", "answer_summary": "A rising allele frequency alone is not enough. The claim needs evidence tying the allele to heritable variation in survival or reproduction in the relevant environment.", "verification_prompt": "Ask what trait effect, fitness difference, environmental context, and alternative mechanisms have been checked.", "misconception_guard": "Avoid assuming every common allele is beneficial.", "didactopus_prompt_seed": "Name a competing explanation and a model run or source that could test it." }, { "id": "afc-008", "type": "model-limits", "question": "What can an Allele Tracker run prove?", "answer_summary": "A simulation can show whether a mechanism is sufficient to produce a pattern under specified assumptions. It does not by itself prove that the same mechanism caused a real historical case.", "verification_prompt": "State the assumptions, parameter values, and missing real-world evidence.", "misconception_guard": "Do not move from model sufficiency to historical proof without source evidence.", "didactopus_prompt_seed": "Write one sentence about what the model shows and one sentence about what remains unknown." }, { "id": "afc-009", "type": "revision", "question": "When should a learner revise an explanation?", "answer_summary": "Revise when repeated trials, changed parameters, or source evidence make the original mechanism less plausible than an alternative or mixed explanation.", "verification_prompt": "Identify which observation conflicted with the first explanation and what replacement explanation fits better.", "misconception_guard": "Revision is not failure; it is the expected response to better evidence.", "didactopus_prompt_seed": "Keep the original prediction visible and add a one-sentence revision after the new run." }, { "id": "afc-010", "type": "concept-bridge", "question": "How does this concept connect to the rest of evolution?", "answer_summary": "Allele-frequency change links inheritance, variation, population structure, ecology, and long-term evolutionary patterns. It provides the measurable bridge between mechanism and historical change.", "verification_prompt": "Connect the allele-level explanation to a trait, population, environment, and timescale.", "misconception_guard": "Do not reduce evolution to allele counts alone when trait function, ecology, and history are also relevant.", "didactopus_prompt_seed": "Map the claim from allele to trait to population to evidence." } ], "citegeist_source_slots": [ { "slot": "hardy-weinberg-baseline", "needed_for": "Hardy-Weinberg expectations and null-model framing", "candidate_queries": [ "Hardy 1908 Mendelian proportions mixed population", "Weinberg 1908 genotype frequencies population equilibrium" ], "review_status": "pending" }, { "slot": "genetic-drift-foundations", "needed_for": "Drift, population size, fixation, and sampling effects", "candidate_queries": [ "Wright 1931 evolution in Mendelian populations genetic drift", "Kimura 1968 evolutionary rate at molecular level neutral mutation" ], "review_status": "pending" }, { "slot": "selection-foundations", "needed_for": "Selection as heritable differences in reproductive success", "candidate_queries": [ "Fisher 1930 genetical theory natural selection", "Haldane 1932 causes of evolution selection" ], "review_status": "pending" } ], "doclift_use": "Use this JSON as a fixture for extracting stable concept records from longer Notebook prose, app guides, and bibliography notes.", "groundrecall_use": "Store revisions and unresolved source-slot decisions as durable notes so future Notebook expansion can retrieve the rationale.", "next_review_steps": [ "Backfill reviewed citations through CiteGeist or Literature Explorer.", "Add one worked Allele Tracker example with parameter values and screenshots.", "Connect records to pathway pages for middle-school, high-school, and self-learner audiences." ] }