Results 301 to 310 of about 4,114,102 (347)
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Sex differences, sex ratios and sex roles
Proceedings of the Royal Society of London. Series B: Biological Sciences, 1994Sexual selection theory predicts that sex roles will be determined by the operational sex ratio (OSR), the sex ratio among individuals searching for mates at any given time. There are two predictions: (i) the sex which is in 'excess' will be the more competitive sex with respect to access to mates; and (ii) the sex of which there is a 'shortage' will ...
D.B.A. Thompson, Ian P. F. Owens
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Sex in Geneva, sex in Lilongwe, and sex in Balaka
Social Science & Medicine, 2007This paper compares three interpretations of women and the transmission of HIV in rural Malawi. One is disseminated world-wide by institutions with a global reach such as the World Health Organization in Geneva and United States Agency for International Development (USAID); the second is provided by urban Malawians situated in the capital of Lilongwe ...
Susan Cotts Watkins, Linda Tawfik
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Sex determination and sex reversal
Current Opinion in Genetics & Development, 2006Sex determination in mammals is based on a genetic cascade that controls the fate of the gonads. Gonads will then direct the establishment of phenotypic sex through the production of hormones. Different types of sex reversal are expected to occur if mutations disrupt one of the three steps of gonadal differentiation: formation of the gonadal primordia,
G. Camerino +3 more
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Nature Ecology & Evolution, 2018
While most species have two sexes, multi-sex systems also occur in nature. The frequency of sexual reproduction is a key parameter to explain how many sexes a species has.
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While most species have two sexes, multi-sex systems also occur in nature. The frequency of sexual reproduction is a key parameter to explain how many sexes a species has.
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Sex chromatin and sex hormones
American Journal of Obstetrics and Gynecology, 1967Abstract A study was performed on the influence of sex hormone administration on the incidence of nuclear sex chromatin bodies in women. Testosterone uniformly led to a marked reduction in the incidence of sex chromatin body while progesterone produced a reduction in the majority of cases.
Spas A. Spasov, Dokumov Si
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Science, 1996 In a recent online search, I entered the words “biology” and “gender,” expecting to find papers investigating the ways girls might be socialized out of science careers. I did find some sociological papers, but also listed were a great many studies that had nothing to do with humans and ...
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The Descent of Man, and Selection in Relation to Sex
Nature, 1871II.THAT selection in relation to sex has been an important factor in the formation of the present breeds of animals was more than indicated in the “Origin of Species,“and the theory has since been especially worked out by Professor Haeckel.
P. Smith
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The Sex Lives of Sex Researchers
Contexts, 2014Sociologist Janice M. Irvine examines biographies of Alfred Kinsey in order to explore stigma attached to sexuality research.
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2013
Male and female fetuses differ not only chromosomally but also hormonally. In addition, the postnatal social environment differs for boys and girls, as well as for men and women. Genes, hormones, socialization, and cognitive development combine to produce different behavior between the average male and female, as well as individual differences in sex ...
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Male and female fetuses differ not only chromosomally but also hormonally. In addition, the postnatal social environment differs for boys and girls, as well as for men and women. Genes, hormones, socialization, and cognitive development combine to produce different behavior between the average male and female, as well as individual differences in sex ...
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Sex and Sex-Role Influences in Same-Sex Dyads
Social Psychology Quarterly, 1979Theorizing by Bakan (1966), Bales (1955; 1958), Block (1973), and others suggests that interactional involvement may require the application and synthesis of both traditionally "masculine " (i. e., instrumental) and traditionally "feminine " (i. e., expressive) capacities.
William Ickes +2 more
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