turner syndrome is one of the most common cytogeneti disorders in human with an incidence of one case in about 2500 female live born children. most patients have sexual infantilism and pregnancy is rare. bahner reported the first case of a pregnant turner patients and then the pregnancy of such patients has not been considered impossible. 9 patients out of 243 turner patients referred to karimi...

karyotype of river loach turcinoemacheilus kosswigi from the euphrates river, turkey was investigated using conventional giemsa-staining and c-banding. two females and two males were analyzed. diploid chromosome number was 2n= 50 in all specimens. the karyotype consisted of four pairs of metacentric (m), seven pairs of submeta (sm)-subtelocentric (st) and 14 pairs of acrocentric (a) chromosomes...

a cytogenetic study was performed on 11 tetraploid cotton cultivars (gossypium hirsutum l.)including the oltan cultivar and its crossing progenies. the chromosome pairing and chiasma frequency, aswell as meiotic abnormalities were compared among the genotypes studied. heterozygote translocations withalternate orientation were observed between some of the chromosomes of the a genome and those of...

introduction: x chromosome inactivation (xci) is a process during which one of the two x chromosomes in female human is silenced leading to equal gene expression with males who have only one x chromosome. here we have investigated xci ratio in females with opioid addiction to see whether xci skewness in women could be a risk factor for opioid addiction. methods: 30 adult females meeting dsm iv ...

objective: microdeletions of the y chromosome long arm are the most common molecular genetic causes of severe infertility in men. they affect three regions including azoospermia factors (azfa, azfb and azfc), which contain various genes involved in spermatogenesis. the aim of the present study was to reveal the patterns of y chromosome microdeletions in iranian infertile men referred to royan i...

eight accessions of thyme medicinal plant, belonging to iranian endemic thymus daënensis, t. eriocalyx, t. migricus and an unknown thymus spp species, were tested for karyotypic analysis, using squash technique and 2% (w/v) aceto-orcein staining method. chromosomal parameters examined were: short arm (s), long arm (l), total length of chromosome (tl), arm ratio (ar), r-value, total chromosome v...