![Perspectives](http://s1.studyres.com/store/data/015122512_1-47c342744589f9223fe427d86f660336-300x300.png)
Perspectives
... which actually cause observed effects and realistic mechanisms for their action, and (b)mechanistic reasons why the allozymes’ differences do not cause the effects predictedfromthem.Without evidence for ...
... which actually cause observed effects and realistic mechanisms for their action, and (b)mechanistic reasons why the allozymes’ differences do not cause the effects predictedfromthem.Without evidence for ...
Sympatric speciation: when is it possible
... by separating the frequency-dependent and disruptive selection components, which allows the estimation of the conditions of stable polymorphism. We shall consider a simple case of two resources to illustrate the possibility of such selection. Assume that all the individuals are able to utilize both ...
... by separating the frequency-dependent and disruptive selection components, which allows the estimation of the conditions of stable polymorphism. We shall consider a simple case of two resources to illustrate the possibility of such selection. Assume that all the individuals are able to utilize both ...
Chapter 16 - Sonoma Valley High School
... • Compare three causes of genetic variation in a population. • Calculate allele frequency and phenotype frequency. ...
... • Compare three causes of genetic variation in a population. • Calculate allele frequency and phenotype frequency. ...
Fixing broken masculinity: Viagra asa technology for the production
... Postmodern techno-science scholarship suggests that transsexual, reconstructive, and cosmetic surgeries as well as reproductive technologies provide a window onto both social constructions and medico-technological interventions into gendered and sexualized personhood. In late capitalism, Americans h ...
... Postmodern techno-science scholarship suggests that transsexual, reconstructive, and cosmetic surgeries as well as reproductive technologies provide a window onto both social constructions and medico-technological interventions into gendered and sexualized personhood. In late capitalism, Americans h ...
Speciation and Intra-Specific Taxa
... Reproductive isolation can be induced in fruit flies (Drosophila) in the laboratory over a few generations. Diverse monophyletic “species-flocks” of cichlid fish occupying different African great lakes, have speciated in a surprisingly short period. Evidence from island-endemic species of cichlid fi ...
... Reproductive isolation can be induced in fruit flies (Drosophila) in the laboratory over a few generations. Diverse monophyletic “species-flocks” of cichlid fish occupying different African great lakes, have speciated in a surprisingly short period. Evidence from island-endemic species of cichlid fi ...
Darwin`s Metaphors Revisited: Conceptual Metaphors, Conceptual
... species exhibit clear variations in their morphological organization, physiological functioning, and behavioral patterns, some of which are advantageous while others are disadvantageous, not all the individuals survive the condition of struggle for life. Only the fittest survive the struggle for exi ...
... species exhibit clear variations in their morphological organization, physiological functioning, and behavioral patterns, some of which are advantageous while others are disadvantageous, not all the individuals survive the condition of struggle for life. Only the fittest survive the struggle for exi ...
Sutton 2014 - British Society of Criminology
... apparently any other naturalist, had heard of Mr Matthew’s views…’ It is important to emphasise at this juncture that before Sutton (2014), it is a little known fact that prior knowledge did exist (Dempster, 1996), although it is seldom discussed, that the naturalist and polymath publisher John Loud ...
... apparently any other naturalist, had heard of Mr Matthew’s views…’ It is important to emphasise at this juncture that before Sutton (2014), it is a little known fact that prior knowledge did exist (Dempster, 1996), although it is seldom discussed, that the naturalist and polymath publisher John Loud ...
Darwinians at war Bateson`s place in histories of Darwinism
... the Darwinian research programme. To Mayr's and Bowler's credit, they provide a historical rationale for their definitional approach. Darwin's Origin is said to amalgamate a multitude of theories, influences, and trajectories (Bowler, 1988, pp. 6, 22; and Mayr, 1985). Among these, Darwin's theory of ...
... the Darwinian research programme. To Mayr's and Bowler's credit, they provide a historical rationale for their definitional approach. Darwin's Origin is said to amalgamate a multitude of theories, influences, and trajectories (Bowler, 1988, pp. 6, 22; and Mayr, 1985). Among these, Darwin's theory of ...
Finger length ratio (2D:4D) correlates with physical aggression in
... sexual dimorphism in digit ratio is reversed, and males have relatively longer second digits (Burley and Foster, 2004). This reversed foot pattern matches the reversed toe 2D:4D sexual dimorphism seen in humans (McFadden and Shubel, 2002) but not that found in mice, were sexual dimorphism in hind di ...
... sexual dimorphism in digit ratio is reversed, and males have relatively longer second digits (Burley and Foster, 2004). This reversed foot pattern matches the reversed toe 2D:4D sexual dimorphism seen in humans (McFadden and Shubel, 2002) but not that found in mice, were sexual dimorphism in hind di ...
Document
... intrinsic incompatibilities are less likely to accumulate when gene flow is present6. This being said, adaptive divergence and ecological speciation are not the same. Divergent adaptation alone rarely causes sufficient reproductive isolation to allow the accumulation or persistence of species differ ...
... intrinsic incompatibilities are less likely to accumulate when gene flow is present6. This being said, adaptive divergence and ecological speciation are not the same. Divergent adaptation alone rarely causes sufficient reproductive isolation to allow the accumulation or persistence of species differ ...
Ch. 2 OLC questions
... 3. Artificial selection is different from natural selection because— a. artificial selection is not capable of producing large changes b. artificial selection does not require genetic variation c. natural selection cannot produce new species d. breeders (people) choose which individuals reproduce ba ...
... 3. Artificial selection is different from natural selection because— a. artificial selection is not capable of producing large changes b. artificial selection does not require genetic variation c. natural selection cannot produce new species d. breeders (people) choose which individuals reproduce ba ...
1. In Darwin`s finches— a. occurrence of wet and dry years
... 3. Artificial selection is different from natural selection because— a. artificial selection is not capable of producing large changes b. artificial selection does not require genetic variation c. natural selection cannot produce new species d. breeders (people) choose which individuals reproduce ba ...
... 3. Artificial selection is different from natural selection because— a. artificial selection is not capable of producing large changes b. artificial selection does not require genetic variation c. natural selection cannot produce new species d. breeders (people) choose which individuals reproduce ba ...
CHARACTER DISPLACEMENT: ECOLOGICAL AND
... from the average resource-use or reproductive traits of another species are expected to procure more resources or to be more reproductively successful than other members of their population (Slatkin 1980; Taper and Case 1985, 1992; Abrams 1986; Butlin and Ritchie 1994; Doebeli 1996; Servedio and Noo ...
... from the average resource-use or reproductive traits of another species are expected to procure more resources or to be more reproductively successful than other members of their population (Slatkin 1980; Taper and Case 1985, 1992; Abrams 1986; Butlin and Ritchie 1994; Doebeli 1996; Servedio and Noo ...
Assessing the Effects of an STD Educational
... behavioral counseling to prevent STDs for all sexually active adolescents and adults at increased risk for STDs. High-intensity behavioral counseling is defined as multiple counseling sessions. There is insufficient evidence to support behavioral counseling in non-sexually active adolescents and adu ...
... behavioral counseling to prevent STDs for all sexually active adolescents and adults at increased risk for STDs. High-intensity behavioral counseling is defined as multiple counseling sessions. There is insufficient evidence to support behavioral counseling in non-sexually active adolescents and adu ...
An Assessment of Sexually Transmitted Disease
... have been investigated in prior research; however, these investigations have been limited primarily to older adolescents and young adults. Grounded in the social cognitive and subjective culture theories, this quantitative, cross-sectional study assessed STD knowledge (other than HIV/AIDS) among 7th ...
... have been investigated in prior research; however, these investigations have been limited primarily to older adolescents and young adults. Grounded in the social cognitive and subjective culture theories, this quantitative, cross-sectional study assessed STD knowledge (other than HIV/AIDS) among 7th ...
How to make a sex chromosome
... evolution14,31,32 predicts that recombination will be selected against in the region between a sex-determining gene and a nearby gene with sex-specific effects (Box 2). This theory was based in part on early studies of colouration genetics in the guppy, Poecilia reticulata33, which demonstrated that ...
... evolution14,31,32 predicts that recombination will be selected against in the region between a sex-determining gene and a nearby gene with sex-specific effects (Box 2). This theory was based in part on early studies of colouration genetics in the guppy, Poecilia reticulata33, which demonstrated that ...
Strategic Self-Promotion and Competitor
... Mate preferences can provide an important basis for predicting the content of effective acts of mate attraction. Charles Darwin (1871 ) cogently integrated the expression of mate preferences with the emergence of strategic acts of mate attraction in his theory of sexual selection. Darwin distinguish ...
... Mate preferences can provide an important basis for predicting the content of effective acts of mate attraction. Charles Darwin (1871 ) cogently integrated the expression of mate preferences with the emergence of strategic acts of mate attraction in his theory of sexual selection. Darwin distinguish ...
Charles Darwin and blending inheritance
... prevented the best characterized of the half-bred offspring must be carefully selected.16 I conclude then, that races of most animals and plants, when unconfined in the same country would tend to blend together.17 In this considerably larger draft he responds by pointing out the necessity - as he ha ...
... prevented the best characterized of the half-bred offspring must be carefully selected.16 I conclude then, that races of most animals and plants, when unconfined in the same country would tend to blend together.17 In this considerably larger draft he responds by pointing out the necessity - as he ha ...
nosil vines funk 2005 evolution
... reproductive barriers that derive from the reduced survival of immigrants upon reaching foreign habitats that are ecologically divergent from their native habitat. This selection against immigrants reduces encounters and thus mating opportunities between individuals from divergently adapted populati ...
... reproductive barriers that derive from the reduced survival of immigrants upon reaching foreign habitats that are ecologically divergent from their native habitat. This selection against immigrants reduces encounters and thus mating opportunities between individuals from divergently adapted populati ...
The Role of Sexual Communication in Committed Relationships
... Developing an understanding of what leads to happy, successful relationships is a complicated and intricate task. Researchers have long sought to understand what leads to successful relationships (Bradbury, Fincham, & Beach, 2000). While the function and types of relationships may vary widely, being ...
... Developing an understanding of what leads to happy, successful relationships is a complicated and intricate task. Researchers have long sought to understand what leads to successful relationships (Bradbury, Fincham, & Beach, 2000). While the function and types of relationships may vary widely, being ...
Limnephilid taxa revised by speciation traits
... trait by reviewing several relevant topics in the sciences of taxonomy, molecular genetics and phylogenetics. Perspectives of integrative taxonomy is discussed in context of phenotype versus genotype, immensely complex phenotype versus phenomic challenge, taxonomic impediment versus genetic expedien ...
... trait by reviewing several relevant topics in the sciences of taxonomy, molecular genetics and phylogenetics. Perspectives of integrative taxonomy is discussed in context of phenotype versus genotype, immensely complex phenotype versus phenomic challenge, taxonomic impediment versus genetic expedien ...
Are Random Drift and Natural Selection - Philsci
... because there has been some controversy as to which processes should be considered random drift (Beatty 1992). Indeed, different authors will describe different subsets of this list as constituting the different kinds of random drift processes. For reasons of space, I will discuss only two of these ...
... because there has been some controversy as to which processes should be considered random drift (Beatty 1992). Indeed, different authors will describe different subsets of this list as constituting the different kinds of random drift processes. For reasons of space, I will discuss only two of these ...
Vaginal Orgasm Is Related to Better Mental Health and Is Relevant
... clitoral, vaginal, and cervical stimulation [27]. Zietsch et al. assert that the concept of female orgasmic disorder assumes that “a high rate of orgasm is biological normative for female humans during sexual activity with a partner.” Here, they confuse the issue of what is statistically normative ( ...
... clitoral, vaginal, and cervical stimulation [27]. Zietsch et al. assert that the concept of female orgasmic disorder assumes that “a high rate of orgasm is biological normative for female humans during sexual activity with a partner.” Here, they confuse the issue of what is statistically normative ( ...
clinical practice guidelines for management of sexual dysfunctions
... According to DSM-IVTR, the category of sexual dysfunctions is further sub-divided into 4 categories: (1) primary, (2) general medical condition-related, (3) substance-induced, and (4) not otherwise specified. The advantage of the above classification is that all sexual function disorders are grouped ...
... According to DSM-IVTR, the category of sexual dysfunctions is further sub-divided into 4 categories: (1) primary, (2) general medical condition-related, (3) substance-induced, and (4) not otherwise specified. The advantage of the above classification is that all sexual function disorders are grouped ...
Autoerotic Asphyxiation Syndrome In Adolescent and Young Adult
... their loved one’s bizarre sexual behavior. The task of answering these tough questions is usually left to law enforcement investigators or medical professionals who, most likely, have only limited explanation for the autoerotic practice. The most enigmatic question is: Why did he do it? To answer, i ...
... their loved one’s bizarre sexual behavior. The task of answering these tough questions is usually left to law enforcement investigators or medical professionals who, most likely, have only limited explanation for the autoerotic practice. The most enigmatic question is: Why did he do it? To answer, i ...
Sexual selection
![](https://commons.wikimedia.org/wiki/Special:FilePath/Paon_blanc_Madère_2008.jpg?width=300)
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.