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Background Inferring history from genomic sequences is challenging and problematic because chromosomes are mosaics of thousands of small Identicalby-descent (IBD) fragments, each of them having their own unique story. However, the main events in recent evolution might be deciphered from comparative analysis of numerous loci. A paradox of why humans, whose effective population size is only 104, have...
Introns are integral elements of eukaryotic genomes that perform various important functions and actively participate in gene evolution. We review six distinct roles of spliceosomal introns: (1) sources of non-coding RNA; (2) carriers of transcription regulatory elements; (3) actors in alternative and trans-splicing; (4) enhancers of meiotic crossing over within coding sequences; (5) substrates for...
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