RESEARCH BASE

Search 3,721 documents across 34 fields — every claim tier-rated by evidence

3,721 Documents 34 Sections 43,625 Citations 34,852 Keywords Indexed 4 Evidence Tiers

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.

5 results for "polyploidy"

Z_1_11 Verified Molecular Biology

Z_1_11 — Polyploidy and Genome Duplication

Polyploidy — the possession of more than two complete sets of chromosomes — is a major force in genome evolution, particularly in plants and some animal lineages. Susumu Ohno (1970) proposed that whole genome duplication

polyploidy genome duplication whole genome duplication WGD autopolyploidy allopolyploidy

Z_1_10 Verified Molecular Biology

Z_1_10 — Chromosome Evolution and Karyotype

Karyotype — the number, size, and morphology of chromosomes in a cell — varies enormously across species, from n=1 in the ant Myrmecia pilosula to n=630 in the fern Ophioglossum reticulatum. Humans have 2n=46 (23 pairs),

chromosome evolution karyotype chromosome number Robertsonian translocation chromosome fusion human chromosome 2

R_3_08 Verified Biology & Evolution

R_3_08 — Speciation Mechanisms and Reproductive Isolation

Speciation — the process by which one species splits into two or more reproductively isolated lineages — is the engine of biodiversity. Ernst Mayr's biological species concept (1942) defines species as groups of interbre

speciation reproductive isolation allopatric speciation sympatric speciation peripatric speciation parapatric speciation

R_5_03 Verified Biology & Evolution

R_5_03 — Domestication of Plants and Agriculture

The domestication of plants — one of the most transformative events in human history — began independently in at least 10 geographic centers between ~12,000 and 5,000 years ago. The Fertile Crescent (wheat, barley, lenti

domestication agriculture Neolithic revolution Fertile Crescent teosinte maize

F_3_11 Credible Lost Connections

F_3_11 — Cotton and Textile Diffusion Across Ancient Oceans

The history of cotton (Gossypium spp.) and textile diffusion across the ancient world presents one of the most intriguing puzzles in the study of pre-modern connectivity, combining genetics, archaeology, botany, and tech

cotton textile Gossypium domestication diffusion trans-oceanic

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