Some species of mole voles in eastern Europe and spiny rats in Japan have witnessed the complete disappearance of the Y chromosome and SRY gene, which helps determine the male sex in certain populations of animals. In these species, the X chromosome remains, existing in either a single or dou...
Chromosome analysis of spermatozoa extracted from testes of men with non-obstructive azoospermia Infertile men with azoospermia now have the possibility of fathering children by testicular sperm extraction combined with intracytoplasmic sperm injection... RH Martin,G Calvin,R Alfred,... - 《Human Repro...
AS Lim,Y Fong,SL Yu 摘要: To determine the incidence of sex chromosome aneuploidy in the sperm of two men with a 47,XYY/46,XY karyotype. Case report. Infertility clinic in a teaching hospital. One patient with near normal semen parameters whose wife had a history of miscarriages and one...
The SAGH relies on an X-chromosome-related genetic mechanism. If we wanted to restrict our sample only to gay men with a possible genetic etiology of homosexuality (Swift-Gallant et al., 2019), we would have to work with a sample of gay men who have a homosexual relative. Having a ...
The cells of most women possess two X chromosomes while most men have one X and one Y. So that women’s cells don’t have to carry two versions of each gene on the X chromosome, one from each X, one of the Xs is mainly switched off. It appears that which one stay...
Altogether, the results suggest that Lebanese oligozoospermic men undergoing ART may have an increased risk of transmitting sex chromosome anomalies to their offspring, as well as, in some cases, trisomy 21. Based on this work, genetic counseling programs for Lebanese infertile couples undergoing ...
From the data, I show the internal conflicts, as a result of culture and religion, that these men have. I argue that the men both accommodate social norms while simultaneously challenging them. I therefore present same-sex love as complicated, involving the conforming to, and challenging of, ...
Most mammals have an X and Y chromosome similar to ours; an X with lots of genes, and a Y with SRY plus a few others. This system comes with problems because of the unequal dosage of X genes in males and females. How did such a weird system evolve? The surprising finding...
Estrogen receptors have been detected not only in classical reproductive tissues, but also in immune cell population, including lymphocytes, monocytes and macrophages [2]. In general, while estrogens action increase the immune response, it falls with progesterone and androgens action [10]. As an ...
occurred in a gene on the X, or female, chromosome, its influence was stronger in men than in women. Humans hold two sex chromosomes — men have an X and Y, while women have two Xs. Previous studies have shown that genetic variations on theX chromosomecontribute to the development of ...