, a rheumatologist at the hackensack meridian school of medicine in nutley, n.j., told the journal nature . lahita was not involved in the study. biological sex is determined in mammals by the presence of two x chromosomes in every female cell. males have jus...
We have used the Penna ageing model to analyze how the differences in evolution of sex chromosomes depend on the strategy of reproduction. In panmictic populations, when females (XX) can freely choose the male partner (XY) for reproduction from the whole population, the Y chromosome accumulates ...
" One theory is that males are vulnerable because of their chromosomal makeup, he explains: where women have two X chromosomes, men have an X chromosome and a Y chromosome. "It is said that even before implantation in the wall of the uterus, the newly fertilized XX entity has a leg up...
“Sex” refers to biological differences between women and men, including chromosomes, sex organs, and hormonal profiles. “Gender” refers to socially constructed and enacted roles and behaviors which occur in a historical and cultural context and vary across societies and over time.Every cell has...
Of the 18 patients with X-chromosome mosaicism, 16 were found to have a 45,X cell line, including 14 with 45,X/46,XX/47,XXX mosaicism and 2 with 45,X/46,XX mosaicism. Two patients had 46,XX/47,XXX mosaicism (Table 1). The husbands' karyotypes were normal in all 18 X-...
At Authentixx, we believe that females (meaning someone with XX chromosomes) should be able to compete only against other females. Our collection of women's athletic wear combines contemporary designs with high-performance fabrics, and also helps you express your support for the fight for women’...
We report here the rare case of Trisomy 13/monosomy X mosaicism.A 28-year-old women presented for cytogenetic analysis diagnosed with secondary amenorrhoeaShe had all the prominent features of Turner syndrome at presentation.Cytogenetic investigation was performed on lymphocyte chromosomes.The karyotype...
Therefore, we have docu - mented two cycles with short luteal phases in this patient. DIS C U SSIO N The menstruating patients described here have nonmosaic 45,X gonadal dysgenesis. This number of unambiguous cytoge- netic studies convincingly indicates nonmosaicism (31), and the clinical ...
they more effectively reproduce if they have multiple partners. Women, on the other hand, women, bound by time and the number of children they can carry, are more likely to fare better in fewer and longer sexual relationships. In this new effort, the researchers have tested those principles ...
X and Y, the primary sex chromosomes known, brought two forms of the most influential species on Earth into being: woman and man. Along with the evolution of civilization, women have always been contributing and making positive...