• phenotypic
  • Masculine epigenetic sex marks of the CYP19A1/aromatase promoter in genetically male chicken embryonic gonads are resistant to estrogen-induced phenotypic sex conversion. (biomedsearch.com)
  • These findings substantially increase the number of NR5A1 mutations reported in humans and show that mutations in NR5A1 can be found in patients with a wide range of phenotypic features, ranging from 46,XY sex reversal with primary adrenal failure to male infertility. (wikipedia.org)
  • Proteins
  • Specifically, these proteins regulate the critical decision in this pathway, firing of the establishment promoter of the masterswitch gene, Sex-lethal (Sxl). (nih.gov)
  • Humans
  • This and other factors result in the sex differences in humans. (wikipedia.org)
  • In humans, NR5A1 mutations were first described in patients with 46, XY karyotype and disorders of sex development (DSD), Mullerian structures and primary adrenal failure (MIM 612965). (wikipedia.org)
  • Meiosis
  • The transmission of genetic material in cell division by mitosis or meiosis, the control of these processes and how cell division fits within the cell cycle. (southampton.ac.uk)
  • Über Geschlechtsbestimmung und Reduktionsteilung, 1922 - On sex determination and meiosis. (wikipedia.org)
  • While all prokaryotes reproduce asexually (without the formation and fusion of gametes), mechanisms for lateral gene transfer such as conjugation, transformation and transduction are sometimes likened to sexual reproduction or at least with sex, in the sense of genetic recombination in meiosis. (wikipedia.org)
  • reversal
  • In human, duplication of the NR0B1 gene leads to male-to-female sex reversal. (zfin.org)
  • We generated inheritable nr0b1 mutation in the zebrafish and found the nr0b1 mutation caused homozygous mutants to develop as fertile males due to female-to-male sex reversal. (zfin.org)
  • Introduction of a tp53 mutation into the nr0b1 mutant did not rescue the sex-reversal phenotype. (zfin.org)
  • sperm
  • Female sperm storage is a biological process and often a type of sexual selection in which sperm cells transferred to a female during mating are temporarily retained within a specific part of the reproductive tract before the oocyte, or egg, is fertilized. (wikipedia.org)
  • Female sperm storage is an integral stage in the reproductive process for many animals with internal fertilization. (wikipedia.org)
  • Serving as an arena in which sperm from different mating males compete for access to oocytes, a process called sperm competition, and in which females may preferentially utilize sperm from some males over those of others, called female sperm preference or cryptic female choice (e.g. many invertebrate animals, birds and reptiles). (wikipedia.org)
  • In contrast to the XY sex-determination system and the X0 sex-determination system, where the sperm determines the sex, in the ZW system, the ovum determines the sex of the offspring. (wikipedia.org)
  • The Ericsson method, first applied in a clinical setting in the 1970s by Dr. Ronald J. Ericsson, uses higher concentrations of sperm of the desired sex to increase the likelihood of conceiving that sex. (wikipedia.org)
  • males
  • Birds and many insects have a similar system of sex determination (ZW sex-determination system), in which it is the females that are heterogametic (ZW), while males are homogametic (ZZ). (wikipedia.org)
  • This region appeared mostly undifferentiated between males and females, and no relevant recombination frequency differences were detected between sexes. (genetics.org)
  • Antagonistic co-evolution is the relationship between males and females where sexual morphology changes over time to counteract the opposite's sex traits in order to achieve the maximum reproductive success. (wikipedia.org)
  • Scholars argue that the expected birth sex ratio in a normal population is in the range of 103 to 107 males to females at birth. (wikipedia.org)
  • regulates
  • DAX1 (encoded by the NR0B1 gene) is a vertebrate specific orphan nuclear receptor that regulates gonadal development and sexual determination. (zfin.org)
  • The evolutionarily-conserved sirtuin family of histone deacetylases regulates a multitude of DNA-associated processes. (feedage.com)
  • mechanisms
  • Sociogenomic methodology has been applied to understanding the biology of eusociality include its cellular origin, caste determination in a eusocial hierarchy, and the mechanisms that mediate division of labor. (wikipedia.org)
  • imbalances
  • According to the United Nations Population Fund, the reasons behind sex selection are due to three factors and provide an understanding for sex ratio imbalances as well as to project future trends. (wikipedia.org)
  • morphological
  • He was a member of the Genetics Society of America, the American Morphological Society (president, 1900), the American Society of Naturalists (president, 1909), the Society for Experimental Biology and Medicine (president, 1910-1912), and the American Association for the Advancement of Science (president, 1930). (encyclopedia.com)
  • Caenorhabditis
  • A classic 1988 Cold Spring Harbor monograph, The Nematode Caenorhabditis elegans, described the basic genetics, anatomy and development of the organism. (cshlpress.com)
  • sexual
  • The internal and external sexual organs of boys and girls developed from the same basic body plan, but you know, at birth, you can clearly distinguish the 2 sexes just by looking. (parents.com)
  • Sxl controls sex determination and sexual behavior by inducing the use of a female-specific 3′ splice site in the first intron of transformer ( tra ) pre-mRNA. (genetics.org)
  • differences
  • Furthermore, we provide evidence that differences in ribosome densities across polycistronic transcript segments, together with the conserved structural RNA elements, play a major role in the differential decay process. (feedage.com)
  • Citation
  • In the natural mating process, a queen mates with multiple drones,[citation needed] which may not come from the same hive. (wikipedia.org)