We describe the karyotype, location of nucleolus-organizing regions (NORs) and heterochromatin composition and distribution in Lepidochitona caprearum (Scacchi, 1836). The examined specimens had 2n=24 chromosomes; the elements of pairs 1-4 were metacentric, subtelocentric those of the fifth pair, telocentric the elements of other pairs. NOR-FISH, Ag-NOR- and CMA3 banding showed NORs localized o...

The stickleback family (Gasterosteidae) of fish is less than 40 million years old, yet stickleback species have diverged in both diploid chromosome number (2n) and morphology. We used comparative fluorescence in situ hybridization (FISH) on 2 stickleback species, Gasterosteus aculeatus (2n = 42) and Apeltes quadracus (2n = 46), to ascertain the types of chromosome rearrangements that differenti...

In this study, detailed cytogenetic properties of the endemic Ak?ehir chub, Squalius recurvirostris, distributed in basin Ilg?n (Çavu?çu) Lake was investigated by applying standard Giemsa staining, C-banding and Ag-NOR technique. Diploid chromosome number is (2n) 50. A pair heteromorphic chromosomes detected karyotype females. However, difference not observed males. Therefore, it determined tha...

The laboratory mouse is recognized as the pre-eminent model for genetic research. Awareness of chromosomal patterns of experimental animals increases their value for a variety of different fields of study. We aimed to study mitotic chromosome preparations from NIH, C57BL/6 and Razi strains of mice, which are outbred, inbred and partially inbred laboratory mice respectively. Bone marrow cells we...

The karyomorphological study of two species Mahseer belonging to the genus Neolissochilus, namely Neolissochilus hexagonolepis and N. hexastichus were carried out. revealed basic chromosome number in both Masheer was observed be 100. However, karyotype formula varied among species. had a diploid 42 metacentric (m), 20 submetacentric (sm), 8 subtelocentric (st) 30 telocentric (t) karyotypic 32 2...

We made a cytogenetic analysis of four species of Oxyopidae and compared it with the karyotype data of all species of this family. In Hamataliwa sp, the mitotic cells showed 2n♂ = 26+X(1)X(2) and telocentric chromosomes. The 2n♂ = 28, which has been described for only one oxyopid spider, is the highest diploid number reported for this family. Peucetia species exhibited distinct karyotype charac...

In Saccharomyces cerevisiae, a reciprocal translocation between chromosome II and a linear plasmid carrying a centromere (CEN6) has split chromosome II into two fragments: one, approximately 530 kilobase pairs (kbp) in size, has the left arm and part of the right arm of chromosome II; the other, a telocentric fragment approximately 350 kbp in size, has CEN6 and the rest of the right arm of chro...

Detailed karyotypes of 4 lily species (Lilium regale, L. duchartrei, L. brownii var viridium and L. leucanthum var. centifolium), native to Qinling Moutains in China, were constructed on the basis of chromosome arm lengths and fluorescence in situ hybridisation (FISH) with the 45S and 5S rDNA sequences as probes. Results showed that the relative length of these 4 genomes were all around 300μm, ...