The relative frequencies of X-ray-induced symmetrical and asymmetrical chromatid interchanges were analysed as a function of the cell cycle in somatic cells of Drosophila melanogaster. In exchanges between autosomes, during the S phase, a clear prevalence of asymmetrical rejoining was observed. Later, this prevalence became reduced as the cell approached mitosis. On the other hand, in the exchanges between X-chromosomes in the females there were no significant variations in the type of rejoining through the cell cycle, there being a slight but consistent preference for symmetrical rejoining. These data are discussed in relation to the hypothesis proposed by Olivieri et al. [12] on the organization of the chromosomal sub-units in the interphase nucleus. © 1976.

X-ray induction of chromatid interchanges in somatic cells of Drosophila melanogaster: Variations through the cell cycle of the pattern of rejoining

Pignone D;
1976

Abstract

The relative frequencies of X-ray-induced symmetrical and asymmetrical chromatid interchanges were analysed as a function of the cell cycle in somatic cells of Drosophila melanogaster. In exchanges between autosomes, during the S phase, a clear prevalence of asymmetrical rejoining was observed. Later, this prevalence became reduced as the cell approached mitosis. On the other hand, in the exchanges between X-chromosomes in the females there were no significant variations in the type of rejoining through the cell cycle, there being a slight but consistent preference for symmetrical rejoining. These data are discussed in relation to the hypothesis proposed by Olivieri et al. [12] on the organization of the chromosomal sub-units in the interphase nucleus. © 1976.
1976
Drosophila
chromosome
mutation
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/301664
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