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Biased Gene Conversion and Its Impact on Genome Evolution

2014· other· en· W1762471142 on OpenAlexaff
Claude Bhérer, Adam Auton

Bibliographic record

VenueEncyclopedia of Life Sciences · 2014
Typeother
Languageen
FieldBiochemistry, Genetics and Molecular Biology
TopicCRISPR and Genetic Engineering
Canadian institutionsUniversité de Montréal
Fundersnot available
KeywordsGene conversionAlleleGeneticsBiologyMendelian inheritanceGenePopulationGenomeHomologous recombination

Abstract

fetched live from OpenAlex

Abstract In most eukaryotes, genetic information is exchanged between homologous chromosomes via the process of recombination. As part of this process, short deoxyribonucleic acid (DNA) tracts of less than 1 kb in length are exchanged between chromosomes in an asymmetric fashion in a process known as gene conversion. When such gene conversion events occur within the vicinity of heterozygous loci, this asymmetric exchange of DNA can result in the non‐Mendelian transmission of alleles. Multiple lines of evidence suggest that this non‐Mendelian transmission is biased in favour of G and C alleles at the expense of A and T alleles. This process, known as biased gene conversion, has a number of important implications for understanding the behaviour of alleles within a population and the base composition of the genome itself. Key Concepts: Biased gene conversion is the preferential transmission of certain alleles to the next generation, arising from asymmetries in the gene conversion process. Biased gene conversion appears to preferentially favour GC alleles over AT alleles, resulting in the overtransmission of GC alleles in regions of high recombination. Biased gene conversion can increase the frequency of an allele in a population. Consistent biased gene conversion can ultimately influence the base composition of the genome, leading to increased levels of GC content. Although a difficult phenomenon to measure, multiple lines of experimental and evolutionary evidence support the existence of biased gene conversion.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.001
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Theoretical or conceptual · Consensus signal: none
GenreCandidate signal: Other · Consensus signal: none
Teacher disagreement score0.005
Threshold uncertainty score0.018

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.001
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0000.001
Scholarly communication0.0010.001
Open science0.0000.001
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0050.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.007
GPT teacher head0.284
Teacher spread0.277 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designTheoretical or conceptual
Domainnot available
GenreOther

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2014
Admission routes1
Has abstractyes

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