Testing theories of sex against the observation that sex is biparental
... We wish to suggest a candidate for such a prediction based upon the following remarkable, yet unexploited, empirical regularity. Each sexually produced o¤spring of any known eukaryotic species is produced from the genetic material of precisely two individuals. That is, sex is always biparental. A c ...
... We wish to suggest a candidate for such a prediction based upon the following remarkable, yet unexploited, empirical regularity. Each sexually produced o¤spring of any known eukaryotic species is produced from the genetic material of precisely two individuals. That is, sex is always biparental. A c ...
Sexual Selection Favors Female‐Biased Sex Ratios: The Balance
... When the cost of producing a male equals the cost of producing a female, natural selection acting on autosomal genes favors an equal sex ratio (Fisher 1930; Frank 1983). This observation appears in most textbooks on evolution (e.g., Freeman and Herron 1998, p. 624; Futuyma 1998, pp. 613–616; Ridley ...
... When the cost of producing a male equals the cost of producing a female, natural selection acting on autosomal genes favors an equal sex ratio (Fisher 1930; Frank 1983). This observation appears in most textbooks on evolution (e.g., Freeman and Herron 1998, p. 624; Futuyma 1998, pp. 613–616; Ridley ...
HIV Prevention
... of whole blood Injection drug use: 0.67% risk per exposure Healthcare workers (needlestick): 0.4% risk per ...
... of whole blood Injection drug use: 0.67% risk per exposure Healthcare workers (needlestick): 0.4% risk per ...
The Life Course Development of Human Sexual Orientation: An
... the sexual orientation dichotomy for men. These types of findings lend support to the notion of an essentialist position which argues for sexual orientation as a natural human kind. There appear to be different sexual ‘types’ of men: those who prefer their own or the opposite sex for sexual activity ...
... the sexual orientation dichotomy for men. These types of findings lend support to the notion of an essentialist position which argues for sexual orientation as a natural human kind. There appear to be different sexual ‘types’ of men: those who prefer their own or the opposite sex for sexual activity ...
Sex in an Evolutionary Perspective: Just Another Reaction Norm
... example, researchers working in fields such as sex-determining mechanisms or with sex-changing species might find it obvious. However, this perspective has not received enough attention, especially in the behavioural sciences (including evolutionary psychology) and in popular accounts of science wit ...
... example, researchers working in fields such as sex-determining mechanisms or with sex-changing species might find it obvious. However, this perspective has not received enough attention, especially in the behavioural sciences (including evolutionary psychology) and in popular accounts of science wit ...
The Hofstede model
... The power distance dimension can be defined as ‘the extent to which less powerful members of a society accept and expect that power is distributed unequally’. In large power distance cultures, everyone has his or her rightful place in a social hierarchy. The rightful place concept is important for u ...
... The power distance dimension can be defined as ‘the extent to which less powerful members of a society accept and expect that power is distributed unequally’. In large power distance cultures, everyone has his or her rightful place in a social hierarchy. The rightful place concept is important for u ...
Safer Choices and Reducing the Risk
... curriculum. Although racial differences were not examined for knowledge gain, the program effect on delayed sexual initiation was greater for blacks than whites. Gender differences were not examined for either knowledge gain or delayed intercourse. No program differences between the Reducing the Ris ...
... curriculum. Although racial differences were not examined for knowledge gain, the program effect on delayed sexual initiation was greater for blacks than whites. Gender differences were not examined for either knowledge gain or delayed intercourse. No program differences between the Reducing the Ris ...
Confronting Sexual Stigma and Prejudice: Theory and Practice
... policies have begun to lose their claims to moral righteousness. In other words, heterosexism’s legitimacy in the United States and elsewhere is increasingly contested (e.g., Kelman, 2001). Psychology has played an important role in this process, a point that is discussed in a later section. ...
... policies have begun to lose their claims to moral righteousness. In other words, heterosexism’s legitimacy in the United States and elsewhere is increasingly contested (e.g., Kelman, 2001). Psychology has played an important role in this process, a point that is discussed in a later section. ...
Eye Tracking of Men`s Preferences for Female Breast Size and
... Eye-tracking techniques can provide data on attention that may shed light on the relative importance of morphological traits when people make attractiveness judgments. In eye-tracking experiments, attentional capture may be an endogenous process, in which participants actively control how they alloc ...
... Eye-tracking techniques can provide data on attention that may shed light on the relative importance of morphological traits when people make attractiveness judgments. In eye-tracking experiments, attentional capture may be an endogenous process, in which participants actively control how they alloc ...
Same-sex sexual behavior and evolution
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
Same-sex sexual behavior and evolution
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
Same-sex sexual behavior and evolution Nathan W. Bailey and Marlene Zuk Review
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
... female pair bonds, which include courtship displays, copulation, mutual grooming behavior and egg incubation. All snails of this species start out male, and have weak sex discrimination. If they pair with another male, then one simply changes sex. Flexibility in sex changing allows for a weak sex-di ...
No. 01-1231: Connecticut v. Doe
... to their crimes than any other type of felon; they prey on the most vulnerable members of society; they inflict devastating, life-altering injuries; and they often act with impunity because many sex offenses, particularly those against children, go unreported. The Connecticut law at issue here is pa ...
... to their crimes than any other type of felon; they prey on the most vulnerable members of society; they inflict devastating, life-altering injuries; and they often act with impunity because many sex offenses, particularly those against children, go unreported. The Connecticut law at issue here is pa ...
Slide 1 - University of Saskatchewan
... Percent male and female animals (Mean±SD) in each treatment are shown. Significantly (p<0.05) female-biased sex ratios were observed in all EE2 treatments. Significant differences are denoted by different letters. ...
... Percent male and female animals (Mean±SD) in each treatment are shown. Significantly (p<0.05) female-biased sex ratios were observed in all EE2 treatments. Significant differences are denoted by different letters. ...
View / pdf version of BT March 2009
... Patients with heart failure require closer monitoring than those with hypertension Patients with heart failure require more frequent monitoring than those with hypertension because they are more likely to be taking multiple medicines and their clinical condition is often less stable. People with hea ...
... Patients with heart failure require closer monitoring than those with hypertension Patients with heart failure require more frequent monitoring than those with hypertension because they are more likely to be taking multiple medicines and their clinical condition is often less stable. People with hea ...
Nebraska`s Commercial Sex Market
... Many individuals advertised on Backpage work together in groups. This introduces the possibility that they are under third-party control, such as an escort agency, massage parlor or a “stable” facilitated by a pimp. When a third party is involved, an individual’s freedom is likely to be constrained. ...
... Many individuals advertised on Backpage work together in groups. This introduces the possibility that they are under third-party control, such as an escort agency, massage parlor or a “stable” facilitated by a pimp. When a third party is involved, an individual’s freedom is likely to be constrained. ...
A comparison of parasite loads on asexual and sexual Phoxinus
... There are a variety of hypothetical benefits of sexual reproduction that may balance its disadvantages. The Red Queen hypothesis proposes that sexually reproducing species are better able to evolve resistance to parasites than asexually reproducing species. A prediction of the Red Queen hypothesis i ...
... There are a variety of hypothetical benefits of sexual reproduction that may balance its disadvantages. The Red Queen hypothesis proposes that sexually reproducing species are better able to evolve resistance to parasites than asexually reproducing species. A prediction of the Red Queen hypothesis i ...
Evolutionary Psychology and Feminism
... problems. In long-term mating, for example, both genders face the problem of identifying mates who will commit to them over the extended temporal durations (Buss and Schmitt 1993). Consequently, psychological solutions to the commitment problem, such as seeking signs of love as a commitment device, ...
... problems. In long-term mating, for example, both genders face the problem of identifying mates who will commit to them over the extended temporal durations (Buss and Schmitt 1993). Consequently, psychological solutions to the commitment problem, such as seeking signs of love as a commitment device, ...
The factors influencing transactional sex among
... A few relatively small-scale quantitative studies analyze socio-demographic factors associated with involvement in transactional sex. Castle and Konate’s (1999) study of young women ages 15–19 in urban and rural areas of Mali reports that women who classified their relationship as sporadic rather t ...
... A few relatively small-scale quantitative studies analyze socio-demographic factors associated with involvement in transactional sex. Castle and Konate’s (1999) study of young women ages 15–19 in urban and rural areas of Mali reports that women who classified their relationship as sporadic rather t ...
Do Sex and Violence Sell? - American Psychological Association
... Bushman & Bonacci, 2002; Parker & Furnham, 2007). There is reason to believe that similar effects may occur when advertisements themselves feature violent and/or sexual content independent from the media content in which they are embedded. For example, several studies found that brands advertised in ...
... Bushman & Bonacci, 2002; Parker & Furnham, 2007). There is reason to believe that similar effects may occur when advertisements themselves feature violent and/or sexual content independent from the media content in which they are embedded. For example, several studies found that brands advertised in ...
Positive feedback in the transition from sexual reproduction to
... reproduction and tychoparthenogenesis in T. cristinae. We genotyped 30 offspring from each of 25 females (n ¼ 750 offspring) at four microsatellite markers (Tim1, Tim4, Tim6 and Tim7), as described in Schwander & Crespi (2009), and compared each offspring’s genotype with its mother’s genotype to det ...
... reproduction and tychoparthenogenesis in T. cristinae. We genotyped 30 offspring from each of 25 females (n ¼ 750 offspring) at four microsatellite markers (Tim1, Tim4, Tim6 and Tim7), as described in Schwander & Crespi (2009), and compared each offspring’s genotype with its mother’s genotype to det ...
Genetic Influences on Female Infidelity and Number of
... nonpaternity estimates ranging from less than 1% to as much as 30% depending on the sample community (Cerda-Flores et al., 1999; Sasse et al., 1994). Such variability in results suggests that cultural and social factors can exert major influence on the prevalence of unfaithful and promiscuous behavi ...
... nonpaternity estimates ranging from less than 1% to as much as 30% depending on the sample community (Cerda-Flores et al., 1999; Sasse et al., 1994). Such variability in results suggests that cultural and social factors can exert major influence on the prevalence of unfaithful and promiscuous behavi ...
Oral sex and HIV
... Studies indicate that oral sex is commonly practiced by sexually active male-female and same-gender couples of various ages, including adolescents. Although there are only limited national data about how often adolescents engage in oral sex, some data suggest that many adolescents who engage in oral ...
... Studies indicate that oral sex is commonly practiced by sexually active male-female and same-gender couples of various ages, including adolescents. Although there are only limited national data about how often adolescents engage in oral sex, some data suggest that many adolescents who engage in oral ...
- Developmental Cognitive Neuroscience Lab
... effects of medications suggest that neurotransmitters in the central nervous system and neuropeptides in the periphery of the body impact sexual arousal. Nitric oxide activity in the penile tissue triggers a cascade of events leading to increased blood flow into the penile capillaries. The medicatio ...
... effects of medications suggest that neurotransmitters in the central nervous system and neuropeptides in the periphery of the body impact sexual arousal. Nitric oxide activity in the penile tissue triggers a cascade of events leading to increased blood flow into the penile capillaries. The medicatio ...
Sex in advertising
Sex in advertising or ""sex sells"" is the use of sex appeal in advertising to help sell a particular product or service. Sexually appealing imagery may or may not pertain to the product or service in question. Examples of sexually appealing imagery include nudity, pin-up girls, and muscular men.The use of sex in advertising can be highly overt or extremely subtle. It ranges from relatively explicit displays of sexual acts, to the use of basic cosmetics to enhance attractive features.