• Fluorescence in situ hybridization (FISH) is the technique of choice to sex embryos. FISH provides a very robust test with a low risk of misdiagnosis; however, testing that only determines the sex of the embryos cannot discriminate between normal and affected male embryos or between normal and carrier female embryos, which is wasteful of male embryos and accepts a level of risk that carrier f...

The Sex-ratio chromosome (SR) is a widespread, multiply inverted rearrangement of the X chromosome present in several species of Drosophila. Male carriers transmit mostly X-bearing sperm. In the absence of strong counteracting selection, SR is expected to increase rapidly to fixation, causing extinction. The present study incorporates a selection-components analysis of SR in laboratory populati...

Background Gender and sex differences in the development of children adolescents are commonly found psychiatric examination. Family developmental history is an important part clinical diagnostic interview, basic examination technique. Attention-deficit/hyperactivity disorder (ADHD) associated with diagnosis-specific markers family history. However, it unclear to what extent ADHD-specific signs ...

CONTEXT The molecular basis for about 70-80% of 46,XY sex-reversed females remains unexplained, because they carry normal copies of the genes (SRY, SOX9, DAX1, DMRT, SF1, WT1) involved in sex determination pathway. OBJECTIVE The objective of this study is to map the chromosomal locus responsible for an unexplained sex-reversed phenotype. DESIGN The study implemented a genome-wide scan using...

Eucommia ulmoides Oliv. is a dioecious species. Currently, there is no method to identify the sex during the juvenile stage that lasts a relatively long time. This study aimed to develop a sex specific Amplified Fragment Length Polymorphism (AFLP) marker for Eucommia ulmoides Oliv. Of a total of 64 AFLP primer combinations screened, primer combination E-ACA/M-CTT produced a 350 bp male-specific...

Bickers and Adams (1949) and Edwards, Norman and Roberts (1961) have presented detailed neuropathological examinations on two cases of hydrocephalus secondary to aqueductal stenosis in families with many hydrocephalic males. These, taken together, provide incontrovertible evidence of a specific syndrome with sex-linked recessive inheritance. In this paper further families are described in which...

Recent studies, primarily in Drosophila, have greatly advanced our understanding of Haldane's rule, the tendency for hybrid sterility or inviability to affect primarily the heterogametic sex (Haldane 1922). Although dominance theory (Turelli and Orr 1995) has been proposed as a general explanation of Haldane's rule, this remains to be tested in female-heterogametic taxa, such as the Lepidoptera...

Common understanding of human sex-linked behaviors is that proximal mechanisms of genetic and hormonal sex, ultimately shaped by the differential reproductive challenges of ancestral males and females, act on the brain to transfer sex-linked predispositions across generations. Here, we extend the debate on the role of nature and nurture in the development of traits in the lifetime of an individ...

We compared the Y-chromosome linkage maps for four salmonid species (Arctic charr, Salvelinus alpinus; Atlantic salmon, Salmo salar; brown trout, Salmo trutta; and rainbow trout, Oncorhynchus mykiss) and a putative Y-linked marker from lake trout (Salvelinus namaycush). These species represent the three major genera within the subfamily Salmoninae of the Salmonidae. The data clearly demonstrate...