as a PDF
... factors that are associated with sexual experiences during adolescence and young adulthood. Two in particular - gender and racial/ethnic affiliation - have received the most attention. Studies reveal that boys and young men often report higher rates of intercourse experience than do girls and young ...
... factors that are associated with sexual experiences during adolescence and young adulthood. Two in particular - gender and racial/ethnic affiliation - have received the most attention. Studies reveal that boys and young men often report higher rates of intercourse experience than do girls and young ...
File - Ms. Tripp
... unpredictably from one generation to the next. • The smaller the population, the more impact genetic drift is likely to have. • Catastrophes (hurricanes, floods, or fires) may kill a lot of individuals, leaving a small population that is unlikely to have the same genetic makeup as the ...
... unpredictably from one generation to the next. • The smaller the population, the more impact genetic drift is likely to have. • Catastrophes (hurricanes, floods, or fires) may kill a lot of individuals, leaving a small population that is unlikely to have the same genetic makeup as the ...
reinforcement in chorus frogs: lifetime fitness
... using a two-tailed randomization test in which S V served as the test statistic (α = 0.05). Each of the 100,000 samples from the null distribution was generated by recomputing S V after randomizing the assignment of cross-type (hybrid or P. feriarum) to family. Hybrid sterility To test for the prese ...
... using a two-tailed randomization test in which S V served as the test statistic (α = 0.05). Each of the 100,000 samples from the null distribution was generated by recomputing S V after randomizing the assignment of cross-type (hybrid or P. feriarum) to family. Hybrid sterility To test for the prese ...
Natural Selection
... description included data about the habits of peppered moths in England, as cited by evolutionists. They have been telling us for years that the variation in the wing color of the peppered moth was the fact that they rest on the sides of trees, and the trees became darker. Well, it turns out that th ...
... description included data about the habits of peppered moths in England, as cited by evolutionists. They have been telling us for years that the variation in the wing color of the peppered moth was the fact that they rest on the sides of trees, and the trees became darker. Well, it turns out that th ...
Darwin Synthetic Interview Webquests
... Suddenly Darwin saw the answer to his problem. Competition between individuals selected favorable traits. All organisms must compete with each other for basic resources—food, water, and space. There is competition both between species and among species. Darwin noticed that competition forced species ...
... Suddenly Darwin saw the answer to his problem. Competition between individuals selected favorable traits. All organisms must compete with each other for basic resources—food, water, and space. There is competition both between species and among species. Darwin noticed that competition forced species ...
Teaching and Learning about Evolution and Natural Selection
... session on artificial and natural selection. Student 2: (a) The ancient man grew the wild mustard and saw some undeveloped, highly packed flowers and tasted it, they found that it was very tasty then they took some seed from that plant and cultivated the undeveloped tightly packed flower and by gene ...
... session on artificial and natural selection. Student 2: (a) The ancient man grew the wild mustard and saw some undeveloped, highly packed flowers and tasted it, they found that it was very tasty then they took some seed from that plant and cultivated the undeveloped tightly packed flower and by gene ...
Evolution Intro
... Variation exists within every population. Much of this variation is in the form of inherited traits.. ...
... Variation exists within every population. Much of this variation is in the form of inherited traits.. ...
Sexual selection when the female directly benefits
... the elaborate trait on which her choice is based. Interestingly, at this equilibrium sexual selection holds the male trait well off the value that would maximize his contribution to her survival or fecundity. Since mean male condition cannot evolve, the mean fitness of females may actually decline a ...
... the elaborate trait on which her choice is based. Interestingly, at this equilibrium sexual selection holds the male trait well off the value that would maximize his contribution to her survival or fecundity. Since mean male condition cannot evolve, the mean fitness of females may actually decline a ...
History of Behavioral and Cognitive
... A Contemporary Cognitive-Behavioral Treatment Program for Juvenile Male Sex Offenders Introduction The Association for the Treatment of Sexual Abusers (1997) and the current literature on sexual offenders state that cognitive-behavioral approaches appear to be the most effective treatment method wit ...
... A Contemporary Cognitive-Behavioral Treatment Program for Juvenile Male Sex Offenders Introduction The Association for the Treatment of Sexual Abusers (1997) and the current literature on sexual offenders state that cognitive-behavioral approaches appear to be the most effective treatment method wit ...
Two Ways of Thinking about Fitness and Natural Selection
... the same way, even if predictive fitness is thought of as a propensity, and so a cause of evolutionary change, it is so closely identified with that change as to make no difference from a scientific point of view-explaining one is the same as explaining the other. Now, what is the relationship betwe ...
... the same way, even if predictive fitness is thought of as a propensity, and so a cause of evolutionary change, it is so closely identified with that change as to make no difference from a scientific point of view-explaining one is the same as explaining the other. Now, what is the relationship betwe ...
Physical Attractiveness as a Signal of Biological Quality
... b vaccine and higher levels of testosterone than their less attractive peers. Men with low levels of testosterone also tend to have high levels of the stress hormone cortisol, suggesting that their immune responses may have been inhibited by stress hormones. Thus, facial attractiveness may serve as ...
... b vaccine and higher levels of testosterone than their less attractive peers. Men with low levels of testosterone also tend to have high levels of the stress hormone cortisol, suggesting that their immune responses may have been inhibited by stress hormones. Thus, facial attractiveness may serve as ...
Sexuality in the Workplace: Organizational Control, Sexual
... in the workplace. Some sexual harassmentresearchershave suggested that women who do not label theirsexual experiencesas sexual harassmentare suffering fromfalse consciousness, implying thatall sexual behavioris harmfulto women (whetherthey think it is or not) and thereforeought to be eliminated from ...
... in the workplace. Some sexual harassmentresearchershave suggested that women who do not label theirsexual experiencesas sexual harassmentare suffering fromfalse consciousness, implying thatall sexual behavioris harmfulto women (whetherthey think it is or not) and thereforeought to be eliminated from ...
Theoretical perspectives on rapid evolutionary change
... with a combination of theoretical and empirical support. Building on Fisher’s microscope metaphor, Kimura (1983) pointed out that smalleffect mutations, even if more numerous, are more likely to be lost by random genetic drift while rare. Consequently, the distribution of mutations that are both ben ...
... with a combination of theoretical and empirical support. Building on Fisher’s microscope metaphor, Kimura (1983) pointed out that smalleffect mutations, even if more numerous, are more likely to be lost by random genetic drift while rare. Consequently, the distribution of mutations that are both ben ...
Thoughts on the Geometry of Macro
... There is a discrepancy between the good job done by random models at the level of molecular evolution versus the domination of adaptive processes perceived by ecologists, functional morphologists, and the like. This discrepancy nicely fits with the assumption of a great tangledness of the genotype ...
... There is a discrepancy between the good job done by random models at the level of molecular evolution versus the domination of adaptive processes perceived by ecologists, functional morphologists, and the like. This discrepancy nicely fits with the assumption of a great tangledness of the genotype ...
Disruptive Selection and then What?
... For disruptive selection to occur, the mean phenotype has to experience the lowest fitness. In the first type, which does not lead to diversification, selection prevents a population from experiencing such a situation for any significant amount of time. Instead, the population evolves away from the ...
... For disruptive selection to occur, the mean phenotype has to experience the lowest fitness. In the first type, which does not lead to diversification, selection prevents a population from experiencing such a situation for any significant amount of time. Instead, the population evolves away from the ...
Patterns of sexual dimorphism in Pan and Gorilla limb bones Tessa
... When the species are further broken down into subspecies (Fig. 4C), P. t. troglodytes shows even more sexual dimorphism, as P. t. schweinfurthii accounts for overlap in the species graph. One of the male outliers and most of the female outliers still remain in the P. t. toglodytes graph however. The ...
... When the species are further broken down into subspecies (Fig. 4C), P. t. troglodytes shows even more sexual dimorphism, as P. t. schweinfurthii accounts for overlap in the species graph. One of the male outliers and most of the female outliers still remain in the P. t. toglodytes graph however. The ...
Antidepressant-Induced Sexual Side Efiects: Incidence
... improved “to some extent” or “quite a lot” when their fluoxetine dose was decreased by 50%.21 The theory behind this model is the concept of a flat-dose response curve, in that a patient who responds to a certain dose is not likely to respond more to a greater dose, and may respond just as well to a ...
... improved “to some extent” or “quite a lot” when their fluoxetine dose was decreased by 50%.21 The theory behind this model is the concept of a flat-dose response curve, in that a patient who responds to a certain dose is not likely to respond more to a greater dose, and may respond just as well to a ...
Chapter_13_HB_How_Populations_Evolve
... • The blue-footed booby has many specialized characteristics that are very functional in water but less useful on land • Such evolutionary adaptations are inherited traits that enhance an organism's ability to survive and reproduce in its particular environment • Evolution is the changes in organism ...
... • The blue-footed booby has many specialized characteristics that are very functional in water but less useful on land • Such evolutionary adaptations are inherited traits that enhance an organism's ability to survive and reproduce in its particular environment • Evolution is the changes in organism ...
Frotteurism. Ms Frakes, Ms. Fournier, Ms. Flynn & Mr. Garner
... referred for psychiatric consultation after his second arrest for rubbing up against strangers in the subway. He would choose his victim while they were still in the station, then follow the women onto the train where he would proceed to press ...
... referred for psychiatric consultation after his second arrest for rubbing up against strangers in the subway. He would choose his victim while they were still in the station, then follow the women onto the train where he would proceed to press ...
Money, Sex and Happiness: An Empirical Study
... aged under 40 years old, the median individual has sex once a week. About 10% of under-40 Americans say they have sexual intercourse at least 4 times a week. Approximately the same proportion say they are celibate and have no sex. In the whole US population, 7% of adults say they have sex 4 or more ...
... aged under 40 years old, the median individual has sex once a week. About 10% of under-40 Americans say they have sexual intercourse at least 4 times a week. Approximately the same proportion say they are celibate and have no sex. In the whole US population, 7% of adults say they have sex 4 or more ...
Evolution and Medicine - Create and Use Your home.uchicago.edu
... other species, have evolved from earlier, ancestral species. “Descent with modification,” Darwin’s term for evolution, accounts for the many anatomic and physiologic similarities between humans and other animals. Rudimentary organs played an important role in Darwin’s argument. These organs have no ...
... other species, have evolved from earlier, ancestral species. “Descent with modification,” Darwin’s term for evolution, accounts for the many anatomic and physiologic similarities between humans and other animals. Rudimentary organs played an important role in Darwin’s argument. These organs have no ...
1 Microevolution in Action Lab: Ferrets and Finches In this lab, you`ll
... Galapagos Island finches are a classic example of the effects of natural selection on populations and how changes in environmental conditions lead to evolutionary change. Two scientists, Peter and Rosemary Grant, are famous for their studies of the finch populations that live in the Galapagos. They ...
... Galapagos Island finches are a classic example of the effects of natural selection on populations and how changes in environmental conditions lead to evolutionary change. Two scientists, Peter and Rosemary Grant, are famous for their studies of the finch populations that live in the Galapagos. They ...
Sexual Disorders - Viktor`s Notes for the Neurosurgery Resident
... accepted norms of sexual behavior & attitudes vary greatly within and among different cultures health professionals should never be judgmental of sexual behaviors; accepted norms of sexual behavior and attitudes are influenced greatly by parents. What is normal and abnormal cannot be defined by heal ...
... accepted norms of sexual behavior & attitudes vary greatly within and among different cultures health professionals should never be judgmental of sexual behaviors; accepted norms of sexual behavior and attitudes are influenced greatly by parents. What is normal and abnormal cannot be defined by heal ...
The Contribution of Selection and Genetic Constraints to Phenotypic
... et al. 2005); however, this requires a highly specific sampling design based on independently replicated evolutionary events. A more generally applicable solution has recently been developed by Hohenlohe and Arnold (2008), in which the known phylogeny of a set of populations or species is used to co ...
... et al. 2005); however, this requires a highly specific sampling design based on independently replicated evolutionary events. A more generally applicable solution has recently been developed by Hohenlohe and Arnold (2008), in which the known phylogeny of a set of populations or species is used to co ...
Sexual selection
Sexual selection is a mode of natural selection where typically members of one gender choose mates of the other gender to mate with, called intersexual selection, and where females normally do the choosing, and competition between members of the same gender to sexually reproduce with members of the opposite sex, called intrasexual selection. These two forms of selection mean that some individuals have better reproductive success than others within a population either from being sexier or preferring sexier partners to produce offspring. For instance in the breeding season sexual selection in frogs occurs with the males first gathering at the water's edge and croaking. The females then arrive and choose the males with the deepest croaks and best territories. Generalizing, males benefit from frequent mating and monopolizing access to a group of fertile females. Females have a limited number of offspring they can have and they maximize the return on the energy they invest in reproduction.First articulated by Charles Darwin who described it as driving speciation and that many organisms had evolved features whose function was deleterious to their individual survival, and then developed by Ronald Fisher in the early 20th century. Sexual selection can lead typically males to extreme efforts to demonstrate their fitness to be chosen by females, producing secondary sexual characteristics, such as ornate bird tails like the peacock plumage, or the antlers of deer, or the manes of lions, caused by a positive feedback mechanism known as a Fisherian runaway, where the passing on of the desire for a trait in one sex is as important as having the trait in the other sex in producing the runaway effect. Although the sexy son hypothesis indicates that females would prefer male sons, Fisher's principle explains why the sex ratio is 1:1 almost without exception. Sexual selection is also found in plants and fungi.The maintenance of sexual reproduction in a highly competitive world has long been one of the major mysteries of biology given that asexual reproduction can reproduce much more quickly as 50% of offspring are not males, unable to produce offspring themselves. However, research published in 2015 indicates that sexual selection can explain the persistence of sexual reproduction.