| These data further support the idea that the observed micronuclei result from preferential exclusion of acentric DNA fragments. |
|
| Giant cell, fourth mitotic division showing replicated mirror image dicentric chromosomes and acentric fragments. |
|
| Other aberrations, such as minutes, acentric rings, dicentrics and exchanges, were rarely seen. |
|
| They are formed by acentric chromosome fragments or whole chromosomes which are not incorporated into daughter nuclei during cell division. |
|
| A dicentric chromosome plus an acentric fragment were scored as one single aberration. |
|
| Six structurally acentric chromosomes were generated from the irradiation of Dp 238, supporting the findings of a previous study. |
|
| Ectopic crossing over causes chromosomal abnormalities, including deletions, translocations, and acentric and dicentric chromosomes. |
|
| Micronuclei may originate from acentric chromosome fragments or whole chromosomes lagging behind during cell division. |
|
| Dicentrics, rings, acentric fragments and asymmetrical translocations were recorded separately. |
|
| Also excluded are exchanges that would generate dicentric or acentric chromosomes, such as exchanges that may occur between rDNA subunits lying in opposite orientation. |
|
| In metaphase, chromatid fragments are attached to the homologous area of the sister chromatid while acentric chromosome fragments are apart from their chromosome of origin. |
|
| Micronuclei can arise from acentric chromosome fragments or whole chromosomes that have not been incorporated in the main nuclei at cell division. |
|
| The analysis of structural aberrations included chromatid and chromosome breaks, appearance of acentric fragments, dicentric chromosomes and chromatid exchanges. |
|
| The cassette was inserted in both possible orientations, to determine any potential influence of ectopic crossovers that lead to acentric and dicentric chromosomes. |
|
| Further, the products of crossovers between inverted repeats may lead to dicentric and acentric chromosomes that often cannot be transmitted to the next generation. |
|
| This paper describes an analysis of the frequency of dicentric chromosomes and acentric fragments in 1260 subjects occupationally exposed to X-rays and 241 controls. |
|
| The first numeral refers to the chromosome providing the centromere-carrying segment, the second to the chromosome supplying the acentric segment. |
|
| In a pericentric inversion, a crossover within the loop does not result in a bridge or an acentric chromosome, but inviable products are produced carrying a duplication and a deletion. |
|
