Deletion Bias in Avian Introns over Evolutionary Timescales
نویسندگان
چکیده
منابع مشابه
Deletion bias in avian introns over evolutionary timescales.
The role that introns play in the function and evolution of nuclear genomes is not fully understood. Recent models of intron evolution suggest that selection and drift may interact to maintain introns in multicellular organisms. In addition, deletion mutations are more likely to become fixed than insertion mutations. Examination of indel substitutions over macroevolutionary timescales in pigeon...
متن کاملGenomic clocks and evolutionary timescales.
For decades, molecular clocks have helped to illuminate the evolutionary timescale of life, but now genomic data pose a challenge for time estimation methods. It is unclear how to integrate data from many genes, each potentially evolving under a different model of substitution and at a different rate. Current methods can be grouped by the way the data are handled (genes considered separately or...
متن کاملGrammar Defined Introns: An Investigation Into Grammars, Introns, and Bias in Grammatical Evolution
We describe an investigation into the design of different grammars on Grammatical Evolution. As part of this investigation we introduce introns using the grammar as a mechanism by which they may be incorporated into Grammatical Evolution. We establish that a bias exists towards certain production rules for each non-terminal in the grammar, and propose alternative mechanisms by which this bias m...
متن کاملTranscriptional rewiring over evolutionary timescales changes quantitative and qualitative properties of gene expression
Evolutionary changes in transcription networks are an important source of diversity across species, yet the quantitative consequences of network evolution have rarely been studied. Here we consider the transcriptional 'rewiring' of the three GAL genes that encode the enzymes needed for cells to convert galactose to glucose. In Saccharomyces cerevisiae, the transcriptional regulator Gal4 binds a...
متن کاملIranian EFL Learners’ Motivational Fluctuation in Task Performance over Different Timescales
Motivation for learning a new language is both self and time-oriented. The language learner’s motivation experiences gradual fluctuation over time and the view of oneself is different on each timescale of the study. Interaction among different timescales throughout the Second Language Development (SLD) is a novel area of investigation (de Bot, 2015). In order to probe this interactive nature, t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Molecular Biology and Evolution
سال: 2004
ISSN: 1537-1719,0737-4038
DOI: 10.1093/molbev/msh051