In this study, the karyo-systematic studies on the Iranian wild almond species A .communis L., A. corduchoruom Bornm., A. trichamygdalus woronow, Amygdalus lycioides Var. horrida Spach were done by the karyological methods. The meristem cells of the root tip were used for these studies. In each species, ten suitable metaphase plates were chosen and photographed so that the morphology of the chr...

The domestic water buffalo (Bubalus bubalis) is an economically important livestock species in many Asian and Mediterranean countries. Two types of water buffalos are river and swamp buffaloes. Genetically, the swamp buffalo has 48 chromosomes (2n = 48) and the river buffalo has 50 chromosomes (2n = 50). Khuzestan province is one of the important centers of buffalo farming in ...

introduction: counting is of the most basic mathematical abilities. many researches have demonstrated that different perceptual abilities can affect counting skills. we investigated the impact of visual search (vs) and visuoumotor organization (vmo) on counting speed. material  and  methods:   a  total  of  40  people  in  two  groups  of borderline  and  normal intellectual ability (20 subject...

the karyotypic characteristics of   chub, squalius cephalus have been investigated by examining metaphase chromosomes spreads obtained from gill and kidney tissues. the fish used in the study were caught with fishing nets from dumlu stream, one of the main tributaries of the karasu river. the live fish were transported to the laboratory,  kept in a well aerated aquarium before analysis and then...

In this work, we introduce a similarity-network-based approach to explore the role of interacting single-cell histone modification signals in haematopoiesis—the process differentiation blood cells. Histones are proteins that provide structural support chromosomes. They subject chemical modifications—acetylation or methylation—that affect degree accessibility genes and, turn, formation different...

Abstract Ionizing radiation is ubiquitous in the environment. Its source can be natural, such as radioactive materials present soil and cosmic rays, or artificial, fuel for nuclear power plants. Overexposure to ionizing may damage living tissue could cause severe health problems (i.e., mutations, sickness, cancer, death). Cytogenetic bio-dosimetry has great advantage take into account inter-ind...

human chromosomes in amnion cells and lymphocytes with normal karyotype and in lymphocytes with pathological karyotype (2n=47, +21) were compared as to their position in the metaphase. none of the collectives showed sex differences. measurement of the radial distances revealed more peripheral position of the majority of large chromosomes. the satellite-carrying chromosomes of the d group always...