PopGen4: Assortative mating
... Positive assortative mating and the process of speciation We do not cover the topic of speciation in this course. However, it is worth noting the potentially important role that positive assortative mating could have in the process of speciation. There are many hypotheses about the causes of specia ...
... Positive assortative mating and the process of speciation We do not cover the topic of speciation in this course. However, it is worth noting the potentially important role that positive assortative mating could have in the process of speciation. There are many hypotheses about the causes of specia ...
Liang, O`Halloran and Tan Metaphor and Symbol
... implied basis for the association for the purpose of investigating the particular socio-cultural values and ideologies reflected in sex education books in Mainland China. (c) Cross-experience metaphor: In representing the physiological activity of sexual intercourse, a unique type of metaphor is ide ...
... implied basis for the association for the purpose of investigating the particular socio-cultural values and ideologies reflected in sex education books in Mainland China. (c) Cross-experience metaphor: In representing the physiological activity of sexual intercourse, a unique type of metaphor is ide ...
natural selection in populations subject to a migration load
... on the same plant for their entire life, and the average per generation movement distance is <12 m (Sandoval 2000). This average includes individuals that did not move from their original plant, and may miss rare long-distance dispersal events. There is one generation per year, and insects mature at ...
... on the same plant for their entire life, and the average per generation movement distance is <12 m (Sandoval 2000). This average includes individuals that did not move from their original plant, and may miss rare long-distance dispersal events. There is one generation per year, and insects mature at ...
Morphological divergence patterns among populations of
... The structure of body size and shape divergence among populations of Poecilia vivipara inhabiting quaternary lagoons in South-eastern Brazil was studied. This species is abundant throughout an environmental gradient formed by water salinity differences. The salinity gradient influences the habitat s ...
... The structure of body size and shape divergence among populations of Poecilia vivipara inhabiting quaternary lagoons in South-eastern Brazil was studied. This species is abundant throughout an environmental gradient formed by water salinity differences. The salinity gradient influences the habitat s ...
Relational frame theory and the experimental analysis of human
... The early research outlined above has not led to a satisfactory understanding of the acquisition of sexual stimulus functions, much less provided insight into more complex phenomena such as how sexual functions, once established in stimuli, might develop and transfer to other stimuli as a result of ...
... The early research outlined above has not led to a satisfactory understanding of the acquisition of sexual stimulus functions, much less provided insight into more complex phenomena such as how sexual functions, once established in stimuli, might develop and transfer to other stimuli as a result of ...
How common is intersex
... Sometimes a child is born with genitalia which cannot be classified as female or male. A genetically female child (i.e., with XX chromosomes) may be born with external genitalia which appear to be those of a normal male. Or, a genetically male child (XY chromosomes) may be born with female-appearing ...
... Sometimes a child is born with genitalia which cannot be classified as female or male. A genetically female child (i.e., with XX chromosomes) may be born with external genitalia which appear to be those of a normal male. Or, a genetically male child (XY chromosomes) may be born with female-appearing ...
15-1 The Puzzle of Life`s Diversity Evolution
... c. do not vary from one location to another. d. remain unchanged when the environment ...
... c. do not vary from one location to another. d. remain unchanged when the environment ...
Of Mice and Metaphysics: Natural Selection and
... to, the individual-level causal processes occurring in a biological population. This allows me to endorse the first role of exclusionary reasoning while rejecting the second. Thus, I preserve the grain of truth in the statistical interpretation while rejecting radical, anticausal claims that are an ...
... to, the individual-level causal processes occurring in a biological population. This allows me to endorse the first role of exclusionary reasoning while rejecting the second. Thus, I preserve the grain of truth in the statistical interpretation while rejecting radical, anticausal claims that are an ...
Curriculum Vitae - The Methodology Center
... Lanza, S.T., Vasilenko, S. A., Butera, N.*, & Dziak, J. (under review). High school seniors in the United States: Trends from 1976 to 2011 in substance use rates and comorbidities. Espinosa-Hernandez, G., Vasilenko, S. A., & Bamaca-Colbert, M. Y. (under revision). The role of gender in normative sex ...
... Lanza, S.T., Vasilenko, S. A., Butera, N.*, & Dziak, J. (under review). High school seniors in the United States: Trends from 1976 to 2011 in substance use rates and comorbidities. Espinosa-Hernandez, G., Vasilenko, S. A., & Bamaca-Colbert, M. Y. (under revision). The role of gender in normative sex ...
The polymorphic prelude to Bateson–Dobzhansky–Muller
... to genetic mixing of different ancestral populations or incipient species. Balancing selection: natural selection that acts to maintain polymorphism within a population, such as by rare-allele advantage (frequency-dependent selection) or heterozygote advantage (overdominance). Bateson–Dobzhansky–Mul ...
... to genetic mixing of different ancestral populations or incipient species. Balancing selection: natural selection that acts to maintain polymorphism within a population, such as by rare-allele advantage (frequency-dependent selection) or heterozygote advantage (overdominance). Bateson–Dobzhansky–Mul ...
individual variation in mammals
... statistical models are used (e.g., in accounting for measurement errors in regression analyses). We discuss three aspects of inter-individual variation; phenotypic selection, alternative individual strategies and phenotypic integration, and quantitative genetic analyses. The value of these approache ...
... statistical models are used (e.g., in accounting for measurement errors in regression analyses). We discuss three aspects of inter-individual variation; phenotypic selection, alternative individual strategies and phenotypic integration, and quantitative genetic analyses. The value of these approache ...
An Analytically Tractable Model for Competitive Speciation
... means that each female is guaranteed to eventually find a mate whom she does not reject. In contrast, male mating rates are not normalized but depend on X. Therefore, female choice entails sexual selection on males and leads to a disadvantage for rare ecological phenotypes. Note that in this article ...
... means that each female is guaranteed to eventually find a mate whom she does not reject. In contrast, male mating rates are not normalized but depend on X. Therefore, female choice entails sexual selection on males and leads to a disadvantage for rare ecological phenotypes. Note that in this article ...
Meta-analysis of phenotypic selection on flowering phenology
... approaches cope with all of the above issues (Adams 2008; Lajeunesse 2009). This is a promising approach which will help ecologists and evolutionary biologists improve our understanding of patterns of phenotypic selection. In this study we assessed the patterns of phenotypic selection on flowering p ...
... approaches cope with all of the above issues (Adams 2008; Lajeunesse 2009). This is a promising approach which will help ecologists and evolutionary biologists improve our understanding of patterns of phenotypic selection. In this study we assessed the patterns of phenotypic selection on flowering p ...
Erratum At section 7, second para, line 8 `extant`
... section on adaptive branching species descents going on now, and a second section on escalating progress, from the simplest organisms to the highest, over eons of the past. In 1838, months before Darwin integrated his tree of life with natural selection, this divide had been transformed into a succe ...
... section on adaptive branching species descents going on now, and a second section on escalating progress, from the simplest organisms to the highest, over eons of the past. In 1838, months before Darwin integrated his tree of life with natural selection, this divide had been transformed into a succe ...
The struggle for existence. How the notion of carrying capacity, K
... understanding population regulation in the simplest organisms or cases, and many general conclusions from logistic models should be true also for more realistic situations. Furthermore, the Lotka-Volterra extension of the logistic to competition is also unrealistic for the same reasons as is the log ...
... understanding population regulation in the simplest organisms or cases, and many general conclusions from logistic models should be true also for more realistic situations. Furthermore, the Lotka-Volterra extension of the logistic to competition is also unrealistic for the same reasons as is the log ...
darwin - Columbia College
... with a style of explanation that we can deploy to understand certain types of questions. What sorts of questions? The kinds of issues that had puzzled him from the voyage of the Beagle on concerned the distribution of present organisms (questions of biogeography), the similarities and differences am ...
... with a style of explanation that we can deploy to understand certain types of questions. What sorts of questions? The kinds of issues that had puzzled him from the voyage of the Beagle on concerned the distribution of present organisms (questions of biogeography), the similarities and differences am ...
Vaginal reconstruction/rejuvenation: Is there data to support
... above studies that vaginal repair improves sexual function and sexual quality of life, but is it because of the prolapse creating discomfort causing the woman to avoid intercourse or because of self-image issues regarding the prolapse? Or is it because vaginal relaxation and prolapse may cause decre ...
... above studies that vaginal repair improves sexual function and sexual quality of life, but is it because of the prolapse creating discomfort causing the woman to avoid intercourse or because of self-image issues regarding the prolapse? Or is it because vaginal relaxation and prolapse may cause decre ...
Optimizing selection for quantitative traits with information on an
... Methods to formulate and maximize response to selection for a quantitative trait over multiple generations when information on a quantitative trait locus (major gene) is available were developed to investigate and optimize response to selection in mixed inheritance models. Deterministic models with ...
... Methods to formulate and maximize response to selection for a quantitative trait over multiple generations when information on a quantitative trait locus (major gene) is available were developed to investigate and optimize response to selection in mixed inheritance models. Deterministic models with ...
Reclaiming the Body and the Spirit in Oscar Wilde`s
... ern experiences of female agency, there is no difference between the written word and the methodology applied to its analysis. In other words, concept, directorial perspective, design, and staging allows the theoretical perspective of feminisms to be tested in order to demonstrate if theories work. ...
... ern experiences of female agency, there is no difference between the written word and the methodology applied to its analysis. In other words, concept, directorial perspective, design, and staging allows the theoretical perspective of feminisms to be tested in order to demonstrate if theories work. ...
Sexual Selection in Yeast
... Previous to this question, sex was accepted as a process that promoted greater genetic variation in offspring. This greater variation would in theory lead to better adaptation. The problems with sex were not given much consideration. But upon some consideration, sex seems a terrible strategy for ...
... Previous to this question, sex was accepted as a process that promoted greater genetic variation in offspring. This greater variation would in theory lead to better adaptation. The problems with sex were not given much consideration. But upon some consideration, sex seems a terrible strategy for ...
Selection and Adaptation of Fitness
... evolution remains a key challenge in evolutionary biology. Specifically, understanding how selection operates on phenotypic traits in wild and identifying the genomic regions directly targeted by selection are imperative to fully understand the genetic basis of adaptive evolution (Fisher 1930; Lande ...
... evolution remains a key challenge in evolutionary biology. Specifically, understanding how selection operates on phenotypic traits in wild and identifying the genomic regions directly targeted by selection are imperative to fully understand the genetic basis of adaptive evolution (Fisher 1930; Lande ...
Topics in Human Sexuality: Sexuality Across the Lifespan Childhood
... generally self-discovery; males learn about masturbation from peers. Sexuality in Preadolescence Research continues to confirm that the preadolescent years are not ones in which most children actually engage in sexual behaviors. The percentage of children who had initiated sexual intercourse before ...
... generally self-discovery; males learn about masturbation from peers. Sexuality in Preadolescence Research continues to confirm that the preadolescent years are not ones in which most children actually engage in sexual behaviors. The percentage of children who had initiated sexual intercourse before ...
Topics in Human Sexuality: Sexuality Across the Lifespan Childhood
... Project attempted to study this question. The researchers studied 200 male and female children in an 18-year longitudinal outcome study. At age 17 to 18‚ participants were assessed for levels of self-acceptance, relations with peers‚ parents‚ and other adults; antisocial and criminal behavior; subst ...
... Project attempted to study this question. The researchers studied 200 male and female children in an 18-year longitudinal outcome study. At age 17 to 18‚ participants were assessed for levels of self-acceptance, relations with peers‚ parents‚ and other adults; antisocial and criminal behavior; subst ...
Eye Tracking of Men`s Preferences for Female Breast Size and
... A total of 37 heterosexual men of European descent, ranging in age from 22 to 47 years (M = 30.05 years; SD = 6.21), were recruited opportunistically from the staff and post-graduate student body at Victoria University. Ten of these men were married. Participants were given individual verbal briefin ...
... A total of 37 heterosexual men of European descent, ranging in age from 22 to 47 years (M = 30.05 years; SD = 6.21), were recruited opportunistically from the staff and post-graduate student body at Victoria University. Ten of these men were married. Participants were given individual verbal briefin ...
Sex is good for you - Centre for Disability Studies
... sexuality is an integral part of people’s identity, (Coleman, 2002; Edwards and Coleman, 2004). The Universal Declaration of Human Rights states that ‘everyone has the right to a standard of living adequate for the health and well-being of himself and of his family’, (General Assembly Resolution, Ar ...
... sexuality is an integral part of people’s identity, (Coleman, 2002; Edwards and Coleman, 2004). The Universal Declaration of Human Rights states that ‘everyone has the right to a standard of living adequate for the health and well-being of himself and of his family’, (General Assembly Resolution, Ar ...
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.