• gene
  • DMRT1 is essential in double dosage for male development in humans, despite its location on an autosome [ 10 ] and its functional activation after Sry , the master sex-determining gene [ 11 ]. (royalsocietypublishing.org)
  • This gene is considered the sex-determining gene in chicken, because among genes that govern sexual development, Dmrt1 resides on the sex chromosomes, acts in a sex-specific pattern in the gonad earliest among those genes, and sex is reversed when Dmrt1 expression is suppressed [ 12 ]. (royalsocietypublishing.org)
  • male
  • Dmrt1 is directly responsible for the initiation of male sex differentiation in chicken, Gallus gallus [ 12 ]. (royalsocietypublishing.org)
  • Sen pointed to research that had shown that if men and women receive similar nutritional and medical attention and good health care then females have better survival rates, and it is the male which is the genetically fragile sex. (wikipedia.org)
  • Natural
  • The child sex ratio is within the normal natural range in all eastern and southern states of India, but significantly higher in certain western and particularly northwestern states such as Maharashtra, Haryana, Jammu & Kashmir (118, 120 and 116, as of 2011, respectively). (wikipedia.org)
  • There is an ongoing debate as to whether these high sex ratios are only caused by female foeticide or some of the higher ratio is explained by natural causes. (wikipedia.org)
  • Other scholars question whether birth sex ratio outside 103-107 can be due to natural reasons. (wikipedia.org)
  • He reports that there is an excess of males at birth in almost all human populations, and the natural sex ratio at birth is usually between 102 and 108. (wikipedia.org)
  • pattern
  • The goal of this study was to determine the temporal pattern of putative sex pheromone components during estrus and to assess the reproducibility of changes in pheromone concentration with respect to ovulation time. (diva-portal.org)
  • high
  • In a widely cited article, Amartya Sen compared the birth sex ratio in Europe (106) and United States (105) with those in Asia (107+) and argued that the high sex ratios in East Asia, West Asia and South Asia may be due to excessive female mortality. (wikipedia.org)
  • According to Sen, the high birth sex ratio over decades, implies a female shortfall of 11% in Asia, or over 100 million women as missing from the 3 billion combined population of India, other South Asian countries, West Asia, North Africa and China. (wikipedia.org)
  • human
  • These scholars claim that both the sex ratio at birth and the population sex ratio are remarkably constant in human populations. (wikipedia.org)
  • either
  • Among 34 non-avian reptiles, a convergently evolved pair of amino acids encoded by sequence within exon 2 near the DM-binding domain of Dmrt1 distinguishes species with either type of sex determination. (royalsocietypublishing.org)
  • suggest
  • We suggest that this amino acid shift accompanied the evolution of genotypic sex determination from an ancestral condition of temperature-dependent sex determination at least three times among reptiles, as evident in turtles, birds and squamates. (royalsocietypublishing.org)
  • data
  • However, no conclusive published data show temporal changes in putative sex pheromone levels during estrus. (diva-portal.org)
  • The Indian census data suggests there is a positive correlation between abnormal sex ratio and better socio-economic status and literacy. (wikipedia.org)
  • female
  • The Indian government has passed Pre-Conception and Pre-Natal Diagnostic Techniques Act (PCPNDT) in 1994 to ban and punish prenatal sex screening and female foeticide. (wikipedia.org)