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Dictionary » P » Pattern formation Pattern formationpattern formation (Science: cell biology) One of the classic problems in developmental biology is the way in which complex patterns are formed from an apparently uniform field of cells. Various hypotheses have been put forward and there is now evidence for the existence of gradients of diffusible substances (morphogens) specifying the differentiative pathway that should be followed according to the concentration of the morphogen around the cell. ![]()
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Results from our forumRe: Gene Technology... has a different-colored (lilac) intermediate. The electrophoresis pattern shown in the top row reveals a single enzyme present and corresponds ... If the band was from enzyme 1, the enzyme would have catalyzed the transformation of the uncolored pigment precursor to its lilac form. However, ...
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Recombination in RNA viruses,Ruzic,Kovac... ` acceptor ' RNA molecule to produce a new RNA containing genetic information from more than one source. In this paper we focus on this type ... the presence of recombinant and hence `mosaic' sequences, the tree-like pattern is often replaced by a more complicated `network' that indicates ...
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Re:... confused. My reading tells me that the action of antibiotics is transformation - passing on damaged genes to other cells which all eventually ... grow when they are further from the source of the antibiotic. The exact pattern of inhibition/growth depends on the medium (e.g. agar) used, and ...
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Cytoplasmic Determinants/Signal Induction... Together, cytoplasmic determinants and signal induction determine the pattern formation of organisms by influencing genetic expression.
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question about position of proto and meta xylem in plant... lignification. As for their relative positions, it depends on the pattern of growth- whether it is centrifugal( as in stems where the growth ... development of xylem starts from the periphery of the Stele with the formation of the protoxylem and gradually proceeds towards the pith or medulla ...
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