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POLYTENY [1 record]
Record 1 - internal organization data 2004-12-10
Record 1, English
Record 1, Subject field(s)
- Genetics
- Molecular Biology
Record 1, Main entry term, English
- polyteny
1, record 1, English, polyteny
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
The state where a cell contains polytene chromosomes. 2, record 1, English, - polyteny
Record number: 1, Textual support number: 1 CONT
The polyteny phenomenon [in Drosophila melanogaster polytene chromosomes] involves at least two events. First, the centromeres belonging to all of the four pairs of fruit fly chromosomes fuse in a heterochromatic structure named chromocenter. Almost simultaneously, a somatic pairing of homologues takes place, followed by a polytenisation phenomenon (i.e. many rounds of replication of the euchromatin without subsequent separation of chromatids). 3, record 1, English, - polyteny
Record number: 1, Textual support number: 1 OBS
polytene chromosome: A giant chromosome in which the DNA has undergone repeated replication without separation into new chromosomes. 4, record 1, English, - polyteny
Record 1, French
Record 1, Domaine(s)
- Génétique
- Biologie moléculaire
Record 1, Main entry term, French
- polyténie
1, record 1, French, polyt%C3%A9nie
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Le phénomène de polyténie a été principalement décrit dans les cellules des glandes salivaires de la larve de drosophile. À l'interphase mitotique, les chromosomes homologues restent appariés, et leur ADN se réplique sans division cellulaire ni même nucléaire. Les répliques ne se séparent pas et les centromères fusionnent formant ainsi des chromosomes «géants» dont la structure chromatinienne est aisément observable en microscopie. 2, record 1, French, - polyt%C3%A9nie
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Genética
- Biología molecular
Record 1, Main entry term, Spanish
- politenia
1, record 1, Spanish, politenia
feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
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