..., Synallaxis frontalis , Syndactyla rufosuperciliata , and Cranioleuca obsoleta , to examine the chromosomal structure and evolution of ovenbirds. Our findings revealed that all the species studied had the same diploid number (2n = 82). Differences in chromosomal morphology of some macrochromosomes indicate...

...Lyubov P. Malinovskaya; Anastasia Y. Slobodchikova; Ekaterina O. Grishko; Inna E. Pristyazhnyuk; Anna A. Torgasheva; Pavel M. Borodin Karyotypes of less than 10% of bird species are known. Using immunolocalization of the synaptonemal complex, the core structure of meiotic chromosomes...

...Xueluo Zhang; Junmei Fan; Yanhua Chen; Jun Wang; Zhijiao Song; Jinghui Zhao; Zhongyun Li; Xueqing Wu; Yuanjing Hu In the present study, we retrospectively recruited 340 patients who underwent spontaneous abortions to investigate chromosomal abnormalities of the conception products in the first...

...% of the near-tetraploid metaphases, two der(12)del(C3F1) were detected that almost always appeared in combination with 2 isodicentric fusion chromosomes idic(12)(qter→A1:A1→qter). Regarding the previous results, this cell line could be described in the following composite karyotype: 69–75<4n>,XX...

...Ross Brookwell; Kimberly Finlayson; Jason P. van de Merwe The karyotype of the Odontocete whale, Mesoplodon densirostris , has not been previously reported. The chromosome number is determined to be 2n = 42, and the karyotype is presented using G-, C-, and nucleolar organizer region (NOR) banding...

... respectively labeled with TAMRA or digoxigenin to hybridize with mitotic chromosomes for samples of all localities. It turned out that all probes showed the same signals that appeared in every centromeric region and in the telomeric regions of chromosome 5, without differences within or between populations...

... microscopy showed a cellular spindle cell tumor composed of oval to spindly cells arranged in sheets or fascicles supported by a rich vascular network and stained positive for smooth muscle markers (SMA, HHF35). The majority of metaphase cells from the short-term cultures of tumor cells had 49 chromosomes...

..., androgenetic) animals can be compared. First, we summarize the chromosome manipulation techniques to induce triploids and tetraploids by inhibiting meiotic or mitotic divisions of inseminated eggs, respectively, as well as parthenogenetic animals, obtained after fertilization with genetically inactivated...

...A.E. Barros e Silva; W. dos Santos Soares Filho; M. Guerra Sites of 5S and 45S rDNA are more commonly located on different chromosomes of most angiosperms. Previous investigations have shown that in the subfamily Aurantioideae these sites may appear closely linked (adjacent sites...

...H. Xu; D. Yin; L. Li; Q. Wang; X. Li; X. Yang; W. Liu; D. An To develop a set of molecular markers specific for the chromosome arms of rye, a total of 1,098 and 93 primer pairs derived from the expressed sequence tag (EST) sequences distributed on all 21 wheat chromosomes and 7 rye chromosomes...

...E. Fragouli; D. Wells; J.D.A. Delhanty Aneuploidy is the most commonly occurring type of chromosome abnormality and the most significant clinically. It arises mostly due to segregation errors taking place during female meiosis and is also closely associated with advancing maternal age. Two main...

...E. Fragouli; D. Wells Studies of human cleavage stage embryos, 3 days after fertilization of the oocyte, have revealed remarkably high levels of chromosome abnormality. In addition to meiotic errors derived from the gametes, principally the oocyte, mitotic errors occurring after fertilization...

... hours however, although convincing studies suggesting an age effect for disomies 1, 9, 18 and 21 and the sex chromosomes are in the literature, others failed to notice any association for these or other chromosomes. It is biologically plausible that chromosomal non-disjunction errors should increase...

...D. Ioannou; D.K. Griffin Numerous studies have implicated the role of gross genomic rearrangements in male infertility, e.g., constitutional aneuploidy, translocations, inversions, Y chromosome deletions, elevated sperm disomy, and DNA damage. The primary purpose of this paper is to review male...

...T. Wako; K. Fukui Plants have a wide range of genome sizes. The length of each DNA molecule is usually much longer than the diameter of the cell and the length of each metaphase chromosome is effectively shortened to progress through mitosis. Thus some questions arise, such as: How is genomic DNA...

... complexity can, however, be reduced by using flow cytometry to isolate individual chromosomes, and these can be exploited to construct chromosome-specific BAC libraries. Such libraries simplify the task of physical map construction, positional cloning and the targeted development of genetic markers. Rapid...

...O. Riera-Lizarazu; J.M. Leonard; V.K. Tiwari; S.F. Kianian Radiation hybrid (RH) mapping is based on radiation-induced chromosome breakage rather than meiotic recombination, as a means to induce marker segregation for mapping. To date, the implementation of this mapping approach in hexaploid...

... species exhibited many chromosome aberrations which were associated with their complete or partial sterility. In addition, the karyotype and the structure of mitotic and meiotic lampbrush chromosomes in 2 species and in some back-cross hybrids of this unisexual-bisexual complex have been examined here...

... was absent in all the other tested archaeo- and neo-bratrachian species, as well as non-amphibian species. Fluorescent in situ hybridization (FISH) analysis shows that Dp-sat1 is localized only in peri- and/or para-centromeric areas of the 7 small chromosome pairs, while no labeling was observed in the 7...

... to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Chromosome Idiogram ISCN Level of resolution Short Communication Cytogenet Genome Res 2009;125:162 164 DOI: 10.1159/000227842 Accepted after revision: March 6, 2009...