Chromosomal defects are relatively frequent in infertile men however, translocations between the Y chromosome and autosomes are rare and less than 40 cases of Y-autosome translocation have been reported. In particular, only three individuals has been described with a Y;21 translocation, up to now. We report on an additional case of an infertile man in whom a Y;21 translocation was associated wi...

An adult with an unusual combination of mesodennal defects is presented. A striking finding was the hermation of a major portion of the large bowel into the pericardial cavity through a foramen of Morgagni defect. In addition, the patient exhibited a variety of muscular skeletal anomalies, Monckeberg sclerosis of the muscular arteries, and complete heart block. Urinary mucopolysaccharide excret...

The objective of this study is to investigate the occurrence poor fruit set in Telfairia occidentalis , despite prolific production flowers plant. Consequently, floral morphology male and female plants with respect to: pollen viability, size count distribution for aneuploids polyploids were examined. Floral buds from different ( occidentalis) collected viability was assessed using aceto-carmine...

Purpose
 A number of mechanisms have been proposed for the effect chromosomal translocations on spermatogenesis and sperm maturation. However, there are still numerous ambiguous issues regarding these two processes. The aim this study is to evaluate chromosome break areas count in light literature.
 Material Methods
 was conducted data 16 male patients with reciprocal or Robertso...

the anopheles stephensi mysorensis originating from kazeroon area south of iran, which had been maintained at the laboratory conditions of at 70% relative humidity for almost 150 generations, were subjected to cytogenetical analyses. the ‘instant’ landmarks in the squash preparations of the salivary gland chromosomes are indicative of cytotaxonomic characteristics of the species. the characteri...

The aim of this study was to evaluate the correlation between chromosomal polymorphisms and male infertility. The patients were diagnosed with azoospermia or oligospermiaby a semen analysis. Chromosomal analysis was performed on peripheral blood lymphocytes obtained from the patients, with standard G-banding and C-banding. Y chromosome microdeletions were detected by multiplex polymerase chain ...

In recent years, investigators have noted a trend toward a declining proportion of male births in many industrialized nations. While men bear the sex-determining chromosome, the role of the female partner as it pertains to fertilization or miscarriage may also alter the gender ratio. We attempted to determine a man's secondary sex ratio (F1 generation) by directly examining the sex chromosomes ...

BACKGROUND & OBJECTIVE Chromosomal anomalies have been postulated to be as one of the principal genetic factors in male infertility. Cytogenetic evaluation of men with severely compromised semen parameters reveals an increased incidence of chromosomal aberrations when compared with the normal population. The objective of this study was to determine the chromosomal constitution and sperm charact...

The human and mouse sex chromosomes are enriched in multicopy genes required for postmeiotic differentiation of round spermatids into sperm. The gene Sly is present in multiple copies on the mouse Y chromosome and encodes a protein that is required for the epigenetic regulation of postmeiotic sex chromosome expression. The X chromosome carries two multicopy genes related to Sly: Slx and Slxl1. ...

The house mouse hybrid zone (HMHZ) is a species barrier thought to be maintained by a balance between dispersal and natural selection against hybrids. While the HMHZ is characterized by frequency discontinuities for some sex chromosome markers, there is an unexpected large-scale regional introgression of a Y chromosome across the barrier, in defiance of Haldane's rule. Recent work suggests that...