{"id": "card_bio_population_genetics", "kind": "reference", "title": "Population genetics — Hardy-Weinberg", "body": "In a non-evolving population the genotype frequencies p^2 + 2pq + q^2 sum to 1 (sealed). Departures measure evolution - selection, drift, migration, mutation. Many genotypes, one total: the capstone's sum-to-one in a gene pool.", "source": {"label": "Narrow Highway — biology", "url": "", "authority_tier": "engine_derived"}, "shelf": "codex", "box": "biology", "bands": ["biology", "pillar", "population_genetics", "one map"], "subject": "Population genetics — Hardy-Weinberg", "connections": [{"to_card_id": "card_floor_biology", "relationship": "part_of", "evidence": "a pillar of biology (Population genetics)"}, {"to_card_id": "card_floor_the_capstone", "relationship": "connects_at", "evidence": "allele and genotype frequencies sum to one - 'many possibilities, one total'"}], "author": "engine", "created_at": 0.0, "updated_at": 0.0, "visibility": "public", "lifecycle_stage": "public", "volatility": "permanent", "surface": "secular", "generated": false, "call": "codex.biology", "facets": {"subject": ["one map", "pillar", "population_genetics"]}, "presentation": {"glyph": "•", "kind_label": "biology", "by": "Narrow Highway — biology", "authority": "engine_derived", "posted": "", "standing": ""}, "neighbors": [{"id": "card_floor_biology", "title": "Biology — life is self-replicating chemistry", "relationship": "part of", "why": "a pillar of biology (Population genetics)", "href": "/card/card_floor_biology", "resolved": true}, {"id": "card_floor_the_capstone", "title": "The capstone — one source, many potentials, one end", "relationship": "connects at", "why": "allele and genotype frequencies sum to one - 'many possibilities, one total'", "href": "/card/card_floor_the_capstone", "resolved": true}], "house": {"door": "FIND", "kind": "card", "trail": "connections", "seal": "/card/card_bio_population_genetics", "next_step": {"do": "follow a connection: what this card rests on, and what rests on it", "door": "FIND", "tool": "card_connections", "params": {"id": "card_bio_population_genetics"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}