… RNA viruses as a form of sex. Multi-component viruses may need sex because, like all RNA
viruses, … evolved because smaller RNA molecules are favored by selection on RNAs within a …

… for RNA virus genomes presumably testifies to the rapidity with which selection homogenizes
… that the basic building blocks of RNA viral genes at the level of conserved protein tertiary …

… selection or neutrality at the nucleotide level (21–23), constitute the main body of population
genetics to account for the dynamics of RNA viral populations. Experimental Virus Model …

… did not differ with respect to the G + C content at third codon positions (GC3, Table 2), it is
unlikely that a compositional bias affecting the observed level of synonymous substitution can …

… that during RNA virus evolution, alternative robustness mechanisms may have been selected.
… These intrinsic robustness mechanisms operate efficiently at the population level, despite …

… in RNA viruses argue that rather than being selected for its … challenge for all RNA viruses
is to control the levels of each … ssRNA viruses control gene expression initially at the level of …

… Population genetic models for RNA viruses show that Muller's and … to these viruses. A
re-analysis of published data on … far, selection and fitness have been considered at two levels, …

… all viruses. In +ssRNA viruses, we found that this bias is compensated by selection against
… The pattern at the codon level also led to a particular pattern of amino acid frequencies, with …

… the short highly polymorphic genomes of RNA viruses), our work … We show that even distantly
related viruses within a viral … three levels: prediction ability, percentage of selected amino …

… mutations by RNA viruses, thecontinuous competition among variant genomes, and the
selection of … genomes, even though thedisease-causing variant remains at low levels in the viral …