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Abstract:

Amblytropidia australis and Dichroplus elongatus were found to be polymorphic for supernumerary heterochromatin. In both, basic karyotypes are 2n=22+XO in males. Mitotically unstable extra chromosomes were detected in a population of A. australis. The Bs are telocentric and their number varies from O to 2 within individuals. Mean frequencies of interstitial and total chiasmata at diplotene were compared between individuals with and without Bs. The mean frequency of interstitial chiasmata increases with the number of Bs per cell. A supernumerary terminal segment in S10 pair was observed in a heterozygous condition in several individuals of D. elongatus. The localization and frequency of chiasmata at diplotene were studied. The segment has an intrachromosomal effect since it modifies the location of chiasmata in the bivalent involved. © 1989 Kluwer Academic Publishers.

Registro:

Documento: Artículo
Título:Effects of supernumerary heterochromatin on chiasma condition in two species of Acrididae (Orthoptera)
Autor:Remis, M.I.
Filiación:Lab. de Génetica. Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, UBA, Buenos Aires, 1428, Argentina
Año:1989
Volumen:79
Número:1
Página de inicio:53
Página de fin:61
DOI: http://dx.doi.org/10.1007/BF00056065
Título revista:Genetica
Título revista abreviado:Genetica
ISSN:00166707
CODEN:GENEA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00166707_v79_n1_p53_Remis

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Citas:

---------- APA ----------
(1989) . Effects of supernumerary heterochromatin on chiasma condition in two species of Acrididae (Orthoptera). Genetica, 79(1), 53-61.
http://dx.doi.org/10.1007/BF00056065
---------- CHICAGO ----------
Remis, M.I. "Effects of supernumerary heterochromatin on chiasma condition in two species of Acrididae (Orthoptera)" . Genetica 79, no. 1 (1989) : 53-61.
http://dx.doi.org/10.1007/BF00056065
---------- MLA ----------
Remis, M.I. "Effects of supernumerary heterochromatin on chiasma condition in two species of Acrididae (Orthoptera)" . Genetica, vol. 79, no. 1, 1989, pp. 53-61.
http://dx.doi.org/10.1007/BF00056065
---------- VANCOUVER ----------
Remis, M.I. Effects of supernumerary heterochromatin on chiasma condition in two species of Acrididae (Orthoptera). Genetica. 1989;79(1):53-61.
http://dx.doi.org/10.1007/BF00056065