Sex in an Evolutionary Perspective: Just Another Reaction Norm
... discrete classes (even when leaving aside the obvious case 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 diffe ...
... discrete classes (even when leaving aside the obvious case 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 diffe ...
Evolution Module - McGraw Hill Higher Education
... developing his theory of evolution. Darwin was the founder of the modern theory of evolution. He was not the first individual to propose that organisms evolve or change over time, but he was the first to document this idea with a large amount of supporting evidence and to propose a mechanism by whic ...
... developing his theory of evolution. Darwin was the founder of the modern theory of evolution. He was not the first individual to propose that organisms evolve or change over time, but he was the first to document this idea with a large amount of supporting evidence and to propose a mechanism by whic ...
The frequency of sex in fungi
... and costs of sexual reproduction. Owing to their small genome sizes a lot of population-level genomic data are becoming available that can shed light on these questions. However, as we will show, some more or less fungal-specific mechanisms in reproductive strategies might muddle our interpretation ...
... and costs of sexual reproduction. Owing to their small genome sizes a lot of population-level genomic data are becoming available that can shed light on these questions. However, as we will show, some more or less fungal-specific mechanisms in reproductive strategies might muddle our interpretation ...
Unit 1: Evolution Study Guide Big Idea 1: The process of evolution
... 3. See if you can answer each of these short questions: a. What is the San Andreas Fault? b. What caused the uplift of the Himalayas? c. How can a fossil freshwater reptile be found in both Brazil and west Africa, areas separated today by a wide expanse of ocean? d. Why are no eutherians (placental ...
... 3. See if you can answer each of these short questions: a. What is the San Andreas Fault? b. What caused the uplift of the Himalayas? c. How can a fossil freshwater reptile be found in both Brazil and west Africa, areas separated today by a wide expanse of ocean? d. Why are no eutherians (placental ...
UNIT II – PLANT DIVERSITY
... offspring, becomes more common in the population. If this process continues, eventually, all individuals in the population will be brown. If you have variation, differential reproduction, and heredity, you will have evolution by natural selection as an outcome. It is as simple as that. ...
... offspring, becomes more common in the population. If this process continues, eventually, all individuals in the population will be brown. If you have variation, differential reproduction, and heredity, you will have evolution by natural selection as an outcome. It is as simple as that. ...
Intimacy and Sexuality: Toward a Lifespan Perspective
... social functions, and provides perhaps the most tangible evidence for mind-body interconnectedness.9 Sexual function is an important component and indicator of overall health and well-being; sexual problems or dysfunction may result from, or even cause, physical or mental illness or deterioration in ...
... social functions, and provides perhaps the most tangible evidence for mind-body interconnectedness.9 Sexual function is an important component and indicator of overall health and well-being; sexual problems or dysfunction may result from, or even cause, physical or mental illness or deterioration in ...
Sociological Perspectives - Social Science Computing Cooperative
... Finally, a good deal of contemporary social research into human sexuality is conducted using Sexual Strategies Theory (Buss, 1998), which falls within the evolutionary psychology framework. In their most simple form, evolutionary theories of sexuality argue that sexual selection (i.e. greater sexual ...
... Finally, a good deal of contemporary social research into human sexuality is conducted using Sexual Strategies Theory (Buss, 1998), which falls within the evolutionary psychology framework. In their most simple form, evolutionary theories of sexuality argue that sexual selection (i.e. greater sexual ...
Darwin`s Theory of Evolution
... • In 1809, the year that Darwin was born, Lamarck published his hypotheses • Lamarck proposed that by selective use or disuse of organs, organisms acquired or lost certain traits during their lifetime • These traits could then be passed on to their offspring – Over time, this process led to change i ...
... • In 1809, the year that Darwin was born, Lamarck published his hypotheses • Lamarck proposed that by selective use or disuse of organs, organisms acquired or lost certain traits during their lifetime • These traits could then be passed on to their offspring – Over time, this process led to change i ...
Darwin`s Living Legacy
... Darwin’s writings were remarkably accessible to any literate person, as is evident in this description of natural selection from the introduction to Origin of Species: “As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring ...
... Darwin’s writings were remarkably accessible to any literate person, as is evident in this description of natural selection from the introduction to Origin of Species: “As many more individuals of each species are born than can possibly survive; and as, consequently, there is a frequently recurring ...
Natural Selection - Plain Local Schools
... B. Darwin noticed the animals and plants he observed were uniquely South American C. Darwin was especially intrigued by the Galapagos Islands because of their diversity ...
... B. Darwin noticed the animals and plants he observed were uniquely South American C. Darwin was especially intrigued by the Galapagos Islands because of their diversity ...
Sexual Health - Cystic Fibrosis Ireland
... inheritance. CF is a disease that is inherited in an autosomal recessive pattern. Everybody inherits two copies of the CF gene, cystic fibrosis transmembrane regulator (CFTR). Those with cystic fibrosis inherit two altered copies of the CF gene. A CF carrier is someone who inherits only one defectiv ...
... inheritance. CF is a disease that is inherited in an autosomal recessive pattern. Everybody inherits two copies of the CF gene, cystic fibrosis transmembrane regulator (CFTR). Those with cystic fibrosis inherit two altered copies of the CF gene. A CF carrier is someone who inherits only one defectiv ...
Integration of populations and differentiation of species
... were not included in this analysis, and Orr (1998) has pointed out that major QTLs fixed during an initial bout of natural selection may overshoot the phenotypic optimum, and minor QTLs in the opposite direction may evolve later to bring the trait back to the phenotypic optimum. Although the signatu ...
... were not included in this analysis, and Orr (1998) has pointed out that major QTLs fixed during an initial bout of natural selection may overshoot the phenotypic optimum, and minor QTLs in the opposite direction may evolve later to bring the trait back to the phenotypic optimum. Although the signatu ...
The New York State Forum
... goals. The boards are made up of 20 members who give of their time and contribute their own finances to attend these meetings. Board members accomplish great things, but our organizations could achieve even greater heights with your help. We hope our members will consider becoming more involved in o ...
... goals. The boards are made up of 20 members who give of their time and contribute their own finances to attend these meetings. Board members accomplish great things, but our organizations could achieve even greater heights with your help. We hope our members will consider becoming more involved in o ...
A Study of Sexual Function in Women with Type 2 Diabetes Mellitus
... compared to none in the control group [16]. Sexual pain has been found to form a component together with lubrication and orgasm domains among the women with diabetes, unlike those without diabetes where pain was a separate complaint. Studies conducted in several different ethnic groups have reported ...
... compared to none in the control group [16]. Sexual pain has been found to form a component together with lubrication and orgasm domains among the women with diabetes, unlike those without diabetes where pain was a separate complaint. Studies conducted in several different ethnic groups have reported ...
Unit 2: Change and Diversity of Life
... inherited characteristic that increases an organism’s chance of ...
... inherited characteristic that increases an organism’s chance of ...
Definition of Sexual Harassment - Human Resources
... harassment over the past nine years (1999-2007). This $441 million dollars in monetary benefits does not include the millions of dollars that has been awarded to plaintiffs who have filed sexual harassment lawsuits in state and federal courts throughout the nation. In addition, the legal cost of bri ...
... harassment over the past nine years (1999-2007). This $441 million dollars in monetary benefits does not include the millions of dollars that has been awarded to plaintiffs who have filed sexual harassment lawsuits in state and federal courts throughout the nation. In addition, the legal cost of bri ...
Grade 11 University Biology – Unit 3 Evolution
... survive and reproduce in their environmental setting, AND an organism with traits that provide an advantage is more likely to survive, reproduce and pass its advantageous traits to its offspring. This activity will involve Smarties. There are red and green Smarties. Our Smarties live in a green gras ...
... survive and reproduce in their environmental setting, AND an organism with traits that provide an advantage is more likely to survive, reproduce and pass its advantageous traits to its offspring. This activity will involve Smarties. There are red and green Smarties. Our Smarties live in a green gras ...
miller 2000 mentaltraits - The University of New Mexico
... receivers and signallers, we may be more generous in accepting it as a well-designed adaptation. For fitness indicators that aim to create an impression of how an animal ranks along a single quantitative variable, there is not really much information to convey, so the signal itself need not be very ...
... receivers and signallers, we may be more generous in accepting it as a well-designed adaptation. For fitness indicators that aim to create an impression of how an animal ranks along a single quantitative variable, there is not really much information to convey, so the signal itself need not be very ...
Darwin`s Journey
... resources could not keep up with demand. Malthus reasoned that the human population tends to increase exponentially. For example, if each pair of parents produced four children, the new generation would have 4 individuals to replace the 2 that had produced them. The next generation would have 8, the ...
... resources could not keep up with demand. Malthus reasoned that the human population tends to increase exponentially. For example, if each pair of parents produced four children, the new generation would have 4 individuals to replace the 2 that had produced them. The next generation would have 8, the ...
Genetic analysis of orgasmic function in twins and siblings does not
... siblings from Finland. To confirm within-sex heritability of orgasmic function, we also tested the correlation of 864 pairs of identical twins and compared this with the correlation of 2287 pairs of same-sex nonidentical twins and siblings, using genetic modelling to estimate the proportion of variat ...
... siblings from Finland. To confirm within-sex heritability of orgasmic function, we also tested the correlation of 864 pairs of identical twins and compared this with the correlation of 2287 pairs of same-sex nonidentical twins and siblings, using genetic modelling to estimate the proportion of variat ...
Deleterious effects of recombination and possible
... algae, selfing is also possible through the fusion of two genetically identical haploid clone mates, which is called intrahaploid mating, same clone mating (Perrin, 2012) or haploid selfing (Billiard et al., 2011). Homothallism is a lack of restriction at syngamy, in most of the cases because no dif ...
... algae, selfing is also possible through the fusion of two genetically identical haploid clone mates, which is called intrahaploid mating, same clone mating (Perrin, 2012) or haploid selfing (Billiard et al., 2011). Homothallism is a lack of restriction at syngamy, in most of the cases because no dif ...
Natural selection and population dynamics
... environmental deterioration owing to physical and biotic changes, including increased population density, has the opposite effect, such that the intrinsic rate of increase fluctuates around zero. Thus, although natural selection often determines which individuals survive and reproduce, the actual nu ...
... environmental deterioration owing to physical and biotic changes, including increased population density, has the opposite effect, such that the intrinsic rate of increase fluctuates around zero. Thus, although natural selection often determines which individuals survive and reproduce, the actual nu ...
Lack of Assortative Mating Between Incipient Species of Stickleback
... Both premating and postmating barriers to gene flow can contribute to reproductive isolation but the relative role of these factors, particularly in the early stages of speciation, is not well understood. Evidence suggests that factors contributing to assortative mating and, thus, the development an ...
... Both premating and postmating barriers to gene flow can contribute to reproductive isolation but the relative role of these factors, particularly in the early stages of speciation, is not well understood. Evidence suggests that factors contributing to assortative mating and, thus, the development an ...
2D:4D
... exposure leads to developmental instability which results in certain personality characteristics such as greater spatial ability, decreased verbal ability, increased aggression, increased number of sexual partners, and early age of first sexual experience. Past research is conclusive in suggesting t ...
... exposure leads to developmental instability which results in certain personality characteristics such as greater spatial ability, decreased verbal ability, increased aggression, increased number of sexual partners, and early age of first sexual experience. Past research is conclusive in suggesting t ...
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.