Results 261 to 270 of about 1,757,426 (287)
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Parasitism, mutation accumulation and the maintenance of sex
Nature, 1994Two classes of models attempt to explain why obligate partheno-genesis only rarely replaces sexual reproduction in natural populations, in spite of the apparent reproductive advantage that parthenogens gain by producing only female offspring. The mutation-accumulation models suggest that sex is adaptive because it purges the genome of harmful recurrent
R S, Howard, C M, Lively
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Mutation accumulation of the transcriptome
Nature Genetics, 2005A microarray-based study of the nematode Caenorhabditis elegans offers a first glimpse of the effect of mutation accumulation on transcriptional variation. One major conclusion is that stabilizing selection must constrain the divergence of gene expression profiles in natural populations.
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Cumulative effects of mutation accumulation on mitochondrial function and fitness [PDF]
MitochondrionThe impact of mutations on the mitochondria deserves specific interest due to the crucial role played by these organelles on numerous cellular functions.
Melánia Cristescu +2 more
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Nuclear mutations affecting plastoquinone accumulation in maize
Photosynthesis Research, 1992We have isolated and characterized two nuclear mutations which affect plastoquinone accumulation in maize. The mutations, hcf103 and hcf114, modify the same genetic locus. Plants homozygous for either mutant allele exhibit reduced PS II electron transport activity, reduced variable chlorophyll fluorescence and reduced delayed fluorescence yield.
W B, Cook, D, Miles
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Soluble Model for the Accumulation of Mutations in Asexual Populations
Physical Review Letters, 2001Physical Review ...
A, Colato, J F, Fontanari
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The accumulation and persistence of somatic mutations in vivo
Mutagenesis, 1994Mutant frequencies at the native Dlb-1 and the lacI transgene reach a plateau within 1 week of mutagenesis in the small intestine of mice. This indicates that these mutations are selectively neutral and should accumulate additively. In a test with three mutagens, one potent (ethylnitrosourea) and two weak (1,2-dimethylhydrazine and methyl ...
K S, Tao, J A, Heddle
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Mutation accumulation in space and the maintenance of sexual reproduction
Ecology Letters, 2006AbstractThe maintenance of sexual reproduction remains one of the major puzzles of evolutionary biology, since, all else being equal, an asexual mutant should have a twofold fitness advantage over the sexual wildtype. Most theories suggest that sex helps either to purge deleterious mutations, or to adapt to changing environments.
Salathé, Marcel +3 more
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Making the Case for Mutation Accumulation
2019Having shown that the most salient recent case for pro-modernism is seriously flawed and that there are many apparently good reasons for anti-modernism, we investigate the distal sources of modernity’s pathological quality. We examine the possibility that deleterious mutations—that is, those that tend to impair genetic quality and thus depress fitness ...
Matthew Alexandar Sarraf +2 more
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The Effect of Mutation on the Accumulation of Information in a Genetic Algorithm
2005We use an information theory approach to investigate the role of mutation on Genetic Algorithms (GA). The concept of solution alleles representing information in the GA and the associated concept of information density, being the average frequency of solution alleles in the population, are introduced. Using these concepts, we show that mutation applied
John Milton +2 more
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Selection bias in mutation accumulation
Evolution; International Journal of Organic Evolution, 2022Deepa Agashe, Lindi Wahl
exaly