Sex chromosomes in willows - Epsilon Open Archive
... between the Z/W homologs. We did not find a Fast-Z effect or major degeneration of the W chromosome, suggesting a recent evolution. In fact this sex chromosome system is among the youngest observed so far. Based on our data, the insertion of repetitive sequence and sex specific gene expression appea ...
... between the Z/W homologs. We did not find a Fast-Z effect or major degeneration of the W chromosome, suggesting a recent evolution. In fact this sex chromosome system is among the youngest observed so far. Based on our data, the insertion of repetitive sequence and sex specific gene expression appea ...
Abstinence Works 2013 - The National Abstinence Education
... associated with healthy decision-making, and requisite skills to develop healthy relationships. These classes also discuss medically accurate information about condoms, as well as the causes, symptoms, and the best way to avoid the transmission of STDs, which of course, is abstinence. ...
... associated with healthy decision-making, and requisite skills to develop healthy relationships. These classes also discuss medically accurate information about condoms, as well as the causes, symptoms, and the best way to avoid the transmission of STDs, which of course, is abstinence. ...
How to make a sex chromosome
... increased predation. For males, the benefits of increased mating opportunities outweigh the costs when predation pressures are not too high. In contrast, females gain no benefit from displaying bright colours to offset increased predation, as males are not attracted to ornamented females. Linkage betw ...
... increased predation. For males, the benefits of increased mating opportunities outweigh the costs when predation pressures are not too high. In contrast, females gain no benefit from displaying bright colours to offset increased predation, as males are not attracted to ornamented females. Linkage betw ...
Chapter 7. Sex Determining Mechanisms in Vertebrates
... In a study on the pond turtle Emys orbicularis, all individuals from eggs incubated at 2526°C became males, and all individuals from eggs incubated at 30-30.5°C became females (Zaborski et al. 1982). The gonadal cells of all males typed H-Y negative, as did blood cells of half of them; blood cells ...
... In a study on the pond turtle Emys orbicularis, all individuals from eggs incubated at 2526°C became males, and all individuals from eggs incubated at 30-30.5°C became females (Zaborski et al. 1982). The gonadal cells of all males typed H-Y negative, as did blood cells of half of them; blood cells ...
A Historical Analysis of Public School Sex Education in America
... What was once discussed in hushed tones is now proclaimed on newspaper front pages. The average American receives about 38 sexual media messages per day (Committee on Public Education, 2001), but sex education classes provide the traditional and foundational information vehicle in the schools. The p ...
... What was once discussed in hushed tones is now proclaimed on newspaper front pages. The average American receives about 38 sexual media messages per day (Committee on Public Education, 2001), but sex education classes provide the traditional and foundational information vehicle in the schools. The p ...
From Severe Stigma to Powerful Resilience
... and cultural actors have all characterized youth sexuality and its potential outcomes in this way, and the U.S. methods for addressing these constructed social problems is traditionally saturated with moral panic (Luker, 2006). As a result, young people experience stigma related to their sexuality. ...
... and cultural actors have all characterized youth sexuality and its potential outcomes in this way, and the U.S. methods for addressing these constructed social problems is traditionally saturated with moral panic (Luker, 2006). As a result, young people experience stigma related to their sexuality. ...
Safer Sex - Region of Durham
... Students explore rationales for using barrier methods including condoms and dental dams, learn procedure for correct condom use/dental dam use and begin to explore the idea of communication about barrier method use. Before beginning this section, reinforce the importance of making individual decisio ...
... Students explore rationales for using barrier methods including condoms and dental dams, learn procedure for correct condom use/dental dam use and begin to explore the idea of communication about barrier method use. Before beginning this section, reinforce the importance of making individual decisio ...
Influence of Advertising Sex Appeal on Product
... by it. Many people object to both the nudity in advertising and sexually suggestive advertisements (p.755). According to Wikipedia, the free encyclopedia, sex appeal refers to an individual's ability to attract the sexual or erotic interest of another person. The attraction can be to the physical or ...
... by it. Many people object to both the nudity in advertising and sexually suggestive advertisements (p.755). According to Wikipedia, the free encyclopedia, sex appeal refers to an individual's ability to attract the sexual or erotic interest of another person. The attraction can be to the physical or ...
When Sex is Work: Organizing for Labour Rights and Protections
... Ross argues, “sex-free labour studies alongside work-free sexuality studies within Canadian social history has meant that the rich registers of ‘sexuality’ and ‘labour’ have rarely been placed systematically in relation to, and in tension with, one another.”6 As such, this article broadens the scope ...
... Ross argues, “sex-free labour studies alongside work-free sexuality studies within Canadian social history has meant that the rich registers of ‘sexuality’ and ‘labour’ have rarely been placed systematically in relation to, and in tension with, one another.”6 As such, this article broadens the scope ...
Stachowiak JA, Sherman S, Konakova A, Krushkova I, Peryshkina A, Strathdee S, Beyrer C. Health risks and power among female sex workers in Moscow. SIECUS Rep . Spring 2005;33(2):18-25
... however, suggest that this approach is problematic.They argue that this approach increases the marginalization and stigma already faced by these individuals and as such can breed resentment amongst the target audience, drive commercial sex work further underground, and undermine success. The WHO bel ...
... however, suggest that this approach is problematic.They argue that this approach increases the marginalization and stigma already faced by these individuals and as such can breed resentment amongst the target audience, drive commercial sex work further underground, and undermine success. The WHO bel ...
F - UBC Zoology
... One of the most enduring questions in evolutionary biology is why sexual reproduction has evolved and maintained itself in so many species (BELL 1982; MICHOD and LEVIN 1988). Numerous studies have proposed models to identify the conditions most favorable to the evolution and maintenance of sex and g ...
... One of the most enduring questions in evolutionary biology is why sexual reproduction has evolved and maintained itself in so many species (BELL 1982; MICHOD and LEVIN 1988). Numerous studies have proposed models to identify the conditions most favorable to the evolution and maintenance of sex and g ...
Segregation and the Evolution of Sex Under Overdominant Selection
... sexual population experiences a lower mean fitness compared to an asexual population, a fitness cost known as the segregation load (Crow 1970; Peck and Waxman 2000). We would thus expect that heterozygote advantage would select against sexual reproduction to preserve advantageous one-locus genetic a ...
... sexual population experiences a lower mean fitness compared to an asexual population, a fitness cost known as the segregation load (Crow 1970; Peck and Waxman 2000). We would thus expect that heterozygote advantage would select against sexual reproduction to preserve advantageous one-locus genetic a ...
from shame to game in one hundred years: an
... focus on the manipulation of the child’s rate of time preference. This idea is extended in Doepke and Zilibotti’s (2008) work on the decline of the aristocracy that accompanied the British Industrial Revolution. They argue that parents, who thought that their children might enter the class of skille ...
... focus on the manipulation of the child’s rate of time preference. This idea is extended in Doepke and Zilibotti’s (2008) work on the decline of the aristocracy that accompanied the British Industrial Revolution. They argue that parents, who thought that their children might enter the class of skille ...
a scientific review of abstinence and abstinence programs
... many reviews and studies of abstinence education conclude that the average abstinence program in public schools does not influence the sexual behavior of teenagers. Moreover, many of these reviews and studies are of limited value because they have not studied abstinence education programs focusing o ...
... many reviews and studies of abstinence education conclude that the average abstinence program in public schools does not influence the sexual behavior of teenagers. Moreover, many of these reviews and studies are of limited value because they have not studied abstinence education programs focusing o ...
Collateral Effects of the Media on Sex Offender Reintegration
... Attitudes about sexual offenders may well be associated with their portrayal in the media. The media, which include outlets such as the Internet, newspapers, television, and radio, can influence public attitudes and may thereby impact the reintegration of sex offenders into the community. According ...
... Attitudes about sexual offenders may well be associated with their portrayal in the media. The media, which include outlets such as the Internet, newspapers, television, and radio, can influence public attitudes and may thereby impact the reintegration of sex offenders into the community. According ...
Liang, O`Halloran and Tan Metaphor and Symbol
... that remains clearly identifiable as something that contains each of its constituents” (Morris, 1993, p. 200), may be found in the graft of a politician’s head onto the body of an animal. The process of opposition, which is based on de Saussure’s and others’ work (e.g. de Saussure, 1966), construes ...
... that remains clearly identifiable as something that contains each of its constituents” (Morris, 1993, p. 200), may be found in the graft of a politician’s head onto the body of an animal. The process of opposition, which is based on de Saussure’s and others’ work (e.g. de Saussure, 1966), construes ...
Sex in an Evolutionary Perspective: Just Another Reaction Norm
... of hermaphroditic organisms, for instance most plants). We may recognise the sexes as categories, on the basis of morphology or—when applicable—sex chromosomes, and it is of course often useful to search for and investigate statistical differences in other traits between groups of individuals of dif ...
... of hermaphroditic organisms, for instance most plants). We may recognise the sexes as categories, on the basis of morphology or—when applicable—sex chromosomes, and it is of course often useful to search for and investigate statistical differences in other traits between groups of individuals of dif ...
The Frontal Bone as a Proxy for Sex Estimation in Humans: A
... specific morphological traits in the skull and postcranium indicate the sex of skeletal remains. These general features and specific traits have been researched, and the classification criteria established, based on visual and metric observations. However, quantifying sex estimation can be difficult ...
... specific morphological traits in the skull and postcranium indicate the sex of skeletal remains. These general features and specific traits have been researched, and the classification criteria established, based on visual and metric observations. However, quantifying sex estimation can be difficult ...
RECENT ADVANCES IN SEx IDENTIFICATION OF HUMAN
... attracted more attention and discussion (in terms of supporting and contradictory reports) than any other in the history of forensic anthropology in South Africa. Soon after the publication of the study, the reliability of the method was challenged by Koski31, who concluded that the ramus flexure is ...
... attracted more attention and discussion (in terms of supporting and contradictory reports) than any other in the history of forensic anthropology in South Africa. Soon after the publication of the study, the reliability of the method was challenged by Koski31, who concluded that the ramus flexure is ...
A Guide for Parents - Ohana Policy Group
... their trust in the schools when it comes to education. When it comes to a health course, too many parents assume that the schools are providing medically accurate, age appropriate, reproductionoriented lessons to their children. After reviewing these curricula, we believe this trust is misplaced and ...
... their trust in the schools when it comes to education. When it comes to a health course, too many parents assume that the schools are providing medically accurate, age appropriate, reproductionoriented lessons to their children. After reviewing these curricula, we believe this trust is misplaced and ...
Practicing abstinence from sex follows laws.
... How to Say “No” if You Are Pressured to Be Sexually Active • Focus on keeping your self-respect. – Self-respect is having high regard for oneself because one behaves in responsible ways. – Do not be swayed to change your values. – Giving in to peer pressure will not give you self-respect, and peers ...
... How to Say “No” if You Are Pressured to Be Sexually Active • Focus on keeping your self-respect. – Self-respect is having high regard for oneself because one behaves in responsible ways. – Do not be swayed to change your values. – Giving in to peer pressure will not give you self-respect, and peers ...
Testing theories of sex against the observation that sex is biparental
... precisely two individuals. That is, sex is always biparental. A complete theory of sex, therefore, must explain not only why genetic mixing is su¢ ciently bene…cial that biparental sex overcomes the twofold cost of males it su¤ers relative to asexual reproduction (Maynard Smith, 1978), it must also ...
... precisely two individuals. That is, sex is always biparental. A complete theory of sex, therefore, must explain not only why genetic mixing is su¢ ciently bene…cial that biparental sex overcomes the twofold cost of males it su¤ers relative to asexual reproduction (Maynard Smith, 1978), it must also ...
Does Access To condoms Prevent Teen Pregnancy - kristin-boyd
... one wants to fully prevent pregnancy. Due to the naive attitudes and selfish behavior of teens today, many young adults feel that precaution for sex is not necessary. With no precaution, this gives them an easy opportunity to put the bun in the oven. In my honest opinion, I disagree completely that ...
... one wants to fully prevent pregnancy. Due to the naive attitudes and selfish behavior of teens today, many young adults feel that precaution for sex is not necessary. With no precaution, this gives them an easy opportunity to put the bun in the oven. In my honest opinion, I disagree completely that ...
Nebraska`s Commercial Sex Market
... Advertisements cater to the tastes and preferences of buyers, and provide insight on the individuals being sold for sex as well as the buyers that create the demand. For example, in smaller markets, buyers want new individuals, or “fresh faces,” making it important for individuals sold for sex to re ...
... Advertisements cater to the tastes and preferences of buyers, and provide insight on the individuals being sold for sex as well as the buyers that create the demand. For example, in smaller markets, buyers want new individuals, or “fresh faces,” making it important for individuals sold for sex to re ...
- Northumbria Research Link
... Sex work is commonly considered to take place in towns and cities; this is not to say that the rural cannot be (commercially) sexy, but in common parlance sex work is a distinctly urban practice. Sex work takes place in a variety of indoor and outdoor settings within the city, some more hidden than ...
... Sex work is commonly considered to take place in towns and cities; this is not to say that the rural cannot be (commercially) sexy, but in common parlance sex work is a distinctly urban practice. Sex work takes place in a variety of indoor and outdoor settings within the city, some more hidden than ...
Sex education
Sex education is instruction on issues relating to human sexuality, including human sexual anatomy, sexual reproduction, sexual activity, reproductive health, emotional relations, reproductive rights and responsibilities, sexual abstinence, and birth control. Common avenues for sex education are parents or caregivers, formal school programs, and public health campaigns.Traditionally, adolescents in many cultures were not given any information on sexual matters, with the discussion of these issues being considered taboo. Such instruction, as was given, was traditionally left to a child's parents, and often this was put off until just before a child's marriage. The progressive education movement of the late 19th century, however, led to the introduction of ""social hygiene"" in North American school curricula and the advent of school-based sex education. Despite early inroads of school-based sex education, most of the information on sexual matters in the mid-20th century was obtained informally from friends and the media, and much of this information was deficient or dubious value, especially during the period following puberty when curiosity about sexual matters was the most acute. This deficiency became increasingly evident by the increasing incidence of teenage pregnancies, particularly in Western countries after the 1960s. As part of each country's efforts to reduce such pregnancies, programs of sex education were instituted, initially over strong opposition from parent and religious groups.The outbreak of AIDS has given a new sense of urgency to sex education. In many African countries, where AIDS is at epidemic levels (see HIV/AIDS in Africa), sex education is seen by most scientists as a vital public health strategy. Some international organizations such as Planned Parenthood consider that broad sex education programs have global benefits, such as controlling the risk of overpopulation and the advancement of women's rights (see also reproductive rights). The use of mass media campaigns has sometimes resulted in high levels of ""awareness"" coupled with essentially superficial knowledge of HIV transmission.According to SIECUS, the Sexuality Information and Education Council of the United States, 93% of adults they surveyed support sexuality education in high school and 84% support it in junior high school. In fact, 88% of parents of junior high school students and 80% of parents of secondary school students believe that sex education in school makes it easier for them to talk to their adolescents about sex. Also, 92% of adolescents report that they want both to talk to their parents about sex and to have comprehensive in-school sex education. Furthermore, a ""...study, conducted by Mathematica Policy Research on behalf of the U.S. Department of Health and Human Services, found that abstinence-only-until-marriage programs are ineffective.""