CHE SIGNIFICA POLYTENE IN INGLESE
Cromosoma politenico
I cromosomi politenici sono cromosomi superiori che si sono sviluppati dai cromosomi standard e sono comunemente presenti nelle ghiandole salivari di Drosophila melanogaster. Le cellule specializzate subiscono ripetuti cicli di replicazione del DNA senza divisione cellulare, per aumentare il volume delle cellule, formando un cromosoma poliedene gigante. I cromosomi politenici si formano quando più cicli di replicazione producono molti cromatidi sorelle che rimangono sinapsi insieme.
definizione di polytene nel dizionario inglese
La definizione di politene nel dizionario indica un tipo di cromosoma di dimensioni giganti costituito da molti geni replicati in parallelo, trovato esp in larve di Drosophila.
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10 LIBRI IN INGLESE ASSOCIATI CON «POLYTENE»
Scopri l'uso di
polytene nella seguente selezione bibliografica. Libri associati con
polytene e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Polytene chromosomes in genetic research
Sedat & Manuelidis (1978*) have also published some modifications of methods
suitable for preparation of polytene chromosomes for different kinds of optical
analyses. Gruzdev & Reznik (1981*) have introduced a method for controlled ...
2
Color Atlas of Genetics
Polytene ("many threads") chromosomes, formed as a result of repeated DNA
synthesis without cell division, have a distinct pattern of chromosome banding
readily visible under the light microscope. These chromosomes, first observed in
cells ...
3
Drosophila melanogaster: Practical Uses in Cell and ...
For Drosophila, contig maps come ready-made in the form of polytene
chromosomes. The Drosophila contig maps are aesthetically more pleasing than
DNA clone arrays. They also have a number of practical advantages. Each larva
has its ...
4
Pressure Treatment of
Polytene Chromosomes and Computer ...
Cytogenetic Techniques and Research Questions The most common
experimental exploitation of Drosophila polytene chromosomes, since C.B.
Bridges started publishing his famous drawings of polytene maps in 1935 (
republished and ...
5
Molecular Biology of the Cell
creating a single giant polytene chromosome. The fact that some large insect
cells can undergo a direct polytene-to-polyploid conversion demonstrates that
these two chromosomal states are closely related and that the basic structure of a
...
6
Nuclear Cytology in Relation to Development
Polytene chromosomes of Diptera As seen in the preceding section, the polytene
chromosomes in the giant cells of Phaseolus are present in the diploid number (
the homologues are not paired). Unpaired polytene chromosomes, with a ...
7
In Situ Hybridization Protocols
(1), the technique of in situ hybridization to polytene chromosomes has played a
central role in the molecular genetic analysis of Drosophila melanogaster. The
power of in situ hybridization is due largely to the scale of polytene chromosomes
...
8
Anopheline Species Complexes in South and South-East Asia
Cytogenetic techniques Polytene chromosomes Anopheline females in the semi-
gravid stage have the best polytene chromosomes in ovarian nurse cells (Coluzzi
, 1968). Larvae at the IV instar stage have polytene chromosomes in salivary ...
9
Animal Cytology and Evolution
Studies with tritiated uridine have shown that all loci of these 'secondarily
polytene' chromosomes, and not merely those which are visibly puffed, are
actively synthesizing RNA. This is probably what we would expect, in view of the
presumed ...
103, 189-191. Ashbumer, M. (1969f). Puff loci in the salivary gland chromosomes
of Drosophihi melanogaster. Dros. Inform. Serv. 44, 55. Ashbumer, M. (1970a).
Function and structure of polytene chromosomes during insect development.
7 NOTIZIE DOVE SI INCLUDE IL TERMINE «POLYTENE»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
polytene nel contesto delle seguenti notizie.
The genetic architecture of sexually selected traits in two natural …
Morales-Hojas R, Päällysaho S, Vieira C, Hoikkala A, Vieira J. (2007). Comparative polytene chromosome maps of D. montana and D. virilis. «Nature.com, lug 15»
Discovery of an unexpected function of a protein linked to …
A microscope image of polytene chromosomes from Drosophila melanogaster, in which, using staining techniques, scientists have visualized ... «Phys.Org, apr 15»
Wash: not just for the cytoplasm anymore
Microscopic examination of polytene chromosomes from wash mutants revealed a general lack of organization as well as increased ... «Fred Hutch News Service, apr 15»
Fruit flies reveal normal function of a gene mutated in …
Fly polytene chromosome preparation …more. Disruptive clumps of mutated protein are often blamed for clogging cells and interfering with ... «Medical Xpress, gen 14»
Little Elongation Complex: Study reveals key piece of RNA-splicing …
The little elongation complex (LEC) regulates transcription initiation and elongation of snRNA genes. Shown is a polytene chromosome spread ... «Phys.Org, ago 13»
11 Killed In Fresh Boko Haram Attack In Kano
... one black polytene bag containing items for bomb making, five bags containing substances for making bomb, 20 sealed bags of substances ... «P.M. News, dic 11»
Adaptation of the AFLP technique as a new tool to detect genetic …
In Drosophila, the most widely used technique to detect transposition has traditionally been in situ hybridization on polytene chromosomes, which requires prior ... «BioTechniques.com, apr 11»