the chromosomal spread and karyotype of bleak (alburnus alburnus) from anzali lagoon were identified using tissue squashing techniques with injection of 0.5ml/100g body weight of 0.01% colchicines solution in fish fingerlings. kidney and gill tissues were then extracted and chopped in kcl 0.045m for 20 min and fixed in carnoy solution in 3 stages. the chromosomal spreads were stained in 20% gim...

The aim was to characterize the karyotype of rodents of the genus Proechimys from three localities in the central Brazilian Amazon, in the search for new markers that might shed light on our understanding of the taxonomy and evolutionary history of this taxon. Two karyotypes were found, viz., 2n = 28, FN = 46 in individuals from the NRSP (Cuieiras River) and REMAN (Manaus), and 2n = 46, FN = 50...

Central nervous system (CNS) abnormalities are often isolated but can accompany various genetic syndromes. In this study, we evaluated conventional karyotype results and associated findings of fetuses that were diagnosed with CNS abnormalities. Cases included in the study were diagnosed with fetal CNS anomalies and underwent conventional karyotyping. Conventional karyotype results of subjects w...

Specimens of Hoplias malabaricus from Lagoa Carioca, an isolated lake of the Rio Doce State Park (state of Minas Gerais, Brazil), were cytogenetically studied. The diploid number was found to be constant, i.e., 2n = 42 chromosomes, although two karyotypic forms were found: karyotype A, characterized by 22M + 20SM chromosomes, observed only in a male specimen, and karyotype B, characterized by 2...

The taxonomic position of Hetrodes pupus (Tettigoniidae, Hetrodinae) was clarified by a cytogenetic study of mitotic and meiotic chromosomes, including the localization of heterochromatin by C-banding. The karyotype of this species consists of 26 acrocentric autosomes and an acrocentric X chromosome, the largest element of the karyotype (2n male=27, FN=27; sex determination system is X0 male/XX...

Abstract Study question Do testis-specific cells have a normal karyotype in regions with spermatogonia (SPG) and ongoing spermatogenesis non-mosaic Klinefelter Syndrome (KS) patients? Summary answer While SPG Sertoli (SC) 46,XY spermatogenesis, most Leydig (LC) peritubular myoid (PTMC) 47,XXY karyotype. What is known already Although the majority of KS patients azoospermic, some focal (FS) can ...

This study aimed to determine the possible etiology ot ambiguous genitalia in 41 newborn intants at a referral hospital in Hofuf city, Saudi Arabia. In 46,XX karyotype patients (n 14), congenital adrenal hyperplasia and general malformation disorder were the most common causes of genital ambiguity, while in 46,XY karyotype patients (n=18), testosterone pathway biosynthetic defect was the most c...

Thirty-one patients with chronic primary pure red cell aplasia (PRCA) had blood and marrow cell karyotypes performed prior to immunosuppressive treatment. Only one patient had an abnormal marrow cell karyotype, which revealed a clone of hyperdiploid cells with 47 chromosomes (47, XV, + G). His blood cell karyotype was normal. This patient had no erythroid response to prednisone and cyclophospha...