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The split gene theory is a theory of the origin of introns, long non-coding sequences in eukaryotic genes between the exons. [1] [2] [3] The theory holds that the randomness of primordial DNA sequences would only permit small (< 600bp) open reading frames (ORFs), and that important intron structures and regulatory sequences are derived from stop codons.
Cheongsam (UK: / tʃ (i) ɒ ŋ ˈ s æ m /, US: / tʃ ɔː ŋ ˈ s ɑː m /) or zansae, also known as the qipao (/ ˈ tʃ iː p aʊ /) and sometimes referred to as the mandarin gown, is a Chinese dress worn by women which takes inspiration from the qizhuang, the ethnic clothing of the Manchu people.
A split in phylogenetics is a bipartition of a set of taxa, and the smallest unit of information in unrooted phylogenetic trees: each edge of an unrooted phylogenetic tree represents one split, and the tree can be efficiently reconstructed from its set of splits.
Published online in the Image & Video Library of The American Society for Cell Biology; The Image & Video Library Archived 2011-06-10 at the Wayback Machine of The American Society for Cell Biology contains many videos showing the cell division. The Cell Division of the Cell Image Library; Images : Calanthe discolor Lindl. – Flavon's Secret ...
Fragmentation in multicellular or colonial organisms is a form of asexual reproduction or cloning, where an organism is split into fragments upon maturation and the split part becomes the new individual. The organism may develop specific organs or zones to shed or be easily broken off.
Topologically associating domains within chromosome territories, their borders and interactions. A topologically associating domain (TAD) is a self-interacting genomic region, meaning that DNA sequences within a TAD physically interact with each other more frequently than with sequences outside the TAD. [1]
Incomplete lineage sorting (ILS) [1] [2] [3] (also referred to as hemiplasy, deep coalescence, retention of ancestral polymorphism, or trans-species polymorphism) is a phenomenon in evolutionary biology and population genetics that results in discordance between species and gene trees.
One hypothesis for the evolutionary conservation during the phylotypic period is that it is a period characterized by a high level of interactions as the body plan is being established. [14] In zebrafish, the interconnectivity of proteins over developmental time was found to be highest in early development, supporting the early conservation ...