homogeneously staining regions (hsr) or double minute chromosomes (dmin) are autonomously replicating extra-chromosomal elements that are frequently associated with gene amplifi cation in a variety of cancers. the diagnosis of leukemia patients was based on characterization of the leukemic cells obtained from bone marrow cytogenetics. this study report two cases, one with acute myeloblastic leu...

A cytogenetic study of 15 triploid spontaneous abortuses, 12 trisomic abortuses, and their parents was carried out using the Q-banding technique. Polymorphic regions in abortus chromosomes were compared to corresponding regions of parental chromosomes to determine the origin of the extra chromosomes. Using marker chromosomes it was found that 7 triploids and only one trisomy were informative. T...

Fluorescence in situ hybridization (FISH) technique was used to detect rDNA sites in chickpea and mungbean. In chickpea, the rDNA sites were detected on three pairs of chromosomes. Among these three pairs of chromosomes, one pair exhibited both 25S rDNA and 5S rDNA sites, while in case of other two pairs of chromosomes the 25S rDNA and 5S rDNA sites were located separately on separate pair of c...

Background: Present study aims to investigate if PMC of ovine oocytes in the presence of cilostamide a phosphodiesterase type 3 (PDE3) inhibitor can improve the shortcomings of conventional IVM system. Materials and Methods: Immature ovine oocytes were retrieved from pre antral follicles of abattoir ovaries by aspiration and after washing in Htcm + %10 FBS were immediately classified in four gr...

genus onobrychis comprised of many cultivated as well as wild species is adapted to different regions of iran. this study was conducted to evaluate the karyotype characteristics of seven onobrychis species, employing the analysis of metaphase chromosomes of mitotic cells. results revealed that the species o. melanotricha (from semirom and feriedan)‚ o. sativa (from arak and boroujen) with 2n=28...