RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
176 results for "founder effect" — page 1 of 9
L_1_07 — Genetic Bottlenecks, Founder Effects, and Toba
Genetic bottlenecks — dramatic reductions in population size that slash genetic diversity — and founder effects — the reduced variation carried by small colonizing groups — have profoundly shaped the genomes of species f
L_3_14 — Genetic Bottleneck Recovery and Founder Effects
A genetic bottleneck occurs when a population's size is drastically reduced, causing a random loss of genetic variation (alleles) that cannot be recovered through subsequent population growth. Founder effects are a speci
L_5_02 — Genetic Diseases and Founder Effect Populations
When a small group founds a new population and subsequently expands in relative isolation, genetic drift can amplify alleles that were rare in the ancestral population — including deleterious recessive disease alleles. T
Z_3_09 — Conservation Genetics and Endangered Species
Conservation genetics applies population genetics, genomics, and molecular biology to the preservation of biological diversity. At its core is the recognition that genetic diversity — the raw material for adaptation to c
E_2_02 — Toba Supervolcano and the 74,000 BP Genetic Bottleneck
Approximately 74,000 years ago, the Toba supervolcano on the island of Sumatra (modern Indonesia) produced the largest volcanic eruption in the last 2 million years: a VEI-8 (Volcanic Explosivity Index maximum) event tha
INTERDOC_11 — Mitochondrial Eve, Y-Chromosomal Adam, and the Convergence Problem
Mitochondrial Eve — the most recent common ancestor (MRCA) of all living humans through an unbroken maternal line — was identified through mtDNA analysis by Rebecca Cann, Mark Stoneking, and Allan Wilson at UC Berkeley i
L_2_02 — Population Genetics and Hardy-Weinberg Equilibrium
Population genetics — the mathematical study of allele frequency change in populations — provides the quantitative framework underlying evolutionary biology. The Hardy-Weinberg principle (1908), independently derived by
L_3_04 — Y-Chromosome Phylogeny and Patrilineal Deep History
The Y chromosome, transmitted exclusively from father to son, provides a uniquely informative window into patrilineal human history.
F_1_09 — Austronesian Expansion: The Greatest Maritime Migration
The Austronesian expansion is the most extensive pre-modern maritime migration in human history, covering over half the globe — from Taiwan to Madagascar, Easter Island, Hawaii, and New Zealand — over approximately 5,000
ZA_1_22 — Observer Effect in Quantum Mechanics
The observer effect in quantum mechanics refers to the fundamental principle that measuring a quantum system inevitably disturbs it, and more profoundly, that the act of measurement appears to force a quantum system from
ZF_5_03 — Marine Protected Areas: Conservation Zones, No-Take Reserves, and Effectiveness
Marine Protected Areas (MPAs) are designated ocean regions where human activity is restricted or managed to conserve biodiversity, protect habitats, and sustain marine resources. Ranging from lightly managed multiple-use
Z_1_05 — Genomic Imprinting and Parent-of-Origin Effects
Genomic imprinting is an epigenetic phenomenon in which a gene's expression depends on whether it was inherited from the mother or the father — violating the standard Mendelian assumption that both parental copies functi
ZB_2_24 — Mechanotransduction and Piezoelectric Bioeffects
Living tissue is electrically polarized in response to mechanical stress through two complementary mechanisms: direct piezoelectricity in collagen, bone, and certain proteins, and active mechanotransduction through Piezo
T_2_13 — Placebo and Nocebo Effects
The placebo effect — a measurable physiological or psychological improvement in response to an inert treatment — is one of the most robust and well-documented phenomena in medicine and psychology, while the nocebo effect
Y_4_12 — Psychosomatic Phenomena and the Placebo Effect
Psychosomatic phenomena — bodily changes produced by mental states — and the placebo effect — measurable physiological improvements following inert treatment — demonstrate that consciousness and belief can directly affec
ZE_5_13 — Ethics of Charity and Philanthropy: Effective Altruism and Duty to Give
The ethics of charity and philanthropy interrogates the moral obligations of the wealthy toward the poor, the effectiveness and legitimacy of charitable giving as a response to poverty, and the emerging movement of effec
ZA_1_15 — Quantum Biology Revisited: Quantum Effects in Living Systems
Quantum biology investigates whether non-trivial quantum-mechanical effects — coherence, entanglement, tunneling, and superposition — play functional roles in biological processes, rather than being washed out by the war
ZA_1_09 — Casimir Effect and Vacuum Energy Forces
The Casimir effect, predicted by Dutch physicist Hendrik Casimir in 1948 and experimentally confirmed with increasing precision since the late 1990s, is one of the most remarkable demonstrations that the quantum vacuum i
ZA_1_24 — Quantum Zeno Effect
The quantum Zeno effect (QZE) is the remarkable phenomenon whereby frequent measurements of a quantum system can inhibit its evolution — effectively "freezing" a quantum state by repeatedly confirming that it has not yet
ZA_5_13 — Anyons and Fractional Quantum Hall Effect
Anyons are quasiparticles that exist exclusively in two-dimensional systems and obey quantum statistics intermediate between bosons and fermions — when two identical anyons are exchanged, the wave function acquires a pha
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