title: [Mechanism of chromosome loss after irradiation of mature Drosophila sperm].
abstract: The frequency of radiation-induced chromosome losses is not connected with heterochromatic content but depends on the total chromosomal DNA content. This dependence is of the selective nature and appears as a result of the effect of dominant lethality of non-repaired euchromatic breaks. Simultaneous losses of the two chromosomes in one nucleus are not independent, because of the interaction of the heterochromatic breaks underlying these losses. The conclusion is made that the chromosome losses are involved in the exchange events accompanied by the centromere deletion.
authors.forename: L V
authors.initials: LV
authors.lastname: Omesl'ianchuk
authors.forename: M V
authors.initials: MV
authors.lastname: Klimova
authors.forename: E G
authors.initials: EG
authors.lastname: Ponimaskin
mesh_terms: D000818:Animals; D002869:Chromosome Aberrations; D004247:DNA / Q000528:radiation effects*; D004330:Drosophila / Q000235:genetics* / Q000528:radiation effects; D008297:Male; D013079:Sperm Maturation / Q000235:genetics*; D013094:Spermatozoa / Q000528:radiation effects*
chemical_list: D004247:DNA
vernacular_title: Mekhanizm poter' khromosom pri obluchenii zrelykh spermiev Drozofily