Local adaptation and the evolution of female choice
... selection (the lek paradox; e.g. Borgia, 1979, Rowe and Houle, 1996). The lek paradox is especially important when females choose males based on a trait that is also the target of natural selection (e.g. overall condition), because natural and sexual selection will work together to reduce variation. ...
... selection (the lek paradox; e.g. Borgia, 1979, Rowe and Houle, 1996). The lek paradox is especially important when females choose males based on a trait that is also the target of natural selection (e.g. overall condition), because natural and sexual selection will work together to reduce variation. ...
Chapter 15 Darwin*s Theory of Evolution
... Summary of Darwin's Theory Individuals best suited to their environment survive and reproduce most successfully. These organisms pass their heritable traits to their offspring. Other individuals die or leave fewer offspring. This process of natural selection causes species to change over time. ...
... Summary of Darwin's Theory Individuals best suited to their environment survive and reproduce most successfully. These organisms pass their heritable traits to their offspring. Other individuals die or leave fewer offspring. This process of natural selection causes species to change over time. ...
- mrsolson.com
... 2. Explain Pasteur’s experiment and why it was deemed conclusive. B. Earth’s History 1. What is Radioactive (or Radiometric) dating? 2. What does Half-Life mean? 3. How old is the universe? 4. How old is the earth? 5. What was Oparin’s Hypothesis? 6. What gases did Oparin say were in the Earth’s ear ...
... 2. Explain Pasteur’s experiment and why it was deemed conclusive. B. Earth’s History 1. What is Radioactive (or Radiometric) dating? 2. What does Half-Life mean? 3. How old is the universe? 4. How old is the earth? 5. What was Oparin’s Hypothesis? 6. What gases did Oparin say were in the Earth’s ear ...
WHAT SEXUAL SCIENTISTS KNOW ABOUT... THE SOCIETY FOR
... likely than men over 40 to report very high levels of sexual pleasure. Again various factors may influence this age difference in sexual satisfaction. For example, men over 40 have more difficulties with occasional or continuing erectile dysfunction, and prostate problems become more common with age ...
... likely than men over 40 to report very high levels of sexual pleasure. Again various factors may influence this age difference in sexual satisfaction. For example, men over 40 have more difficulties with occasional or continuing erectile dysfunction, and prostate problems become more common with age ...
Sexual Addiction in Association with Obsessive–Compulsive Disorder
... came to know about the patient’s excessive sexual indulgence with different women around six months back only from one of her female acquaintance with whom the patient was reportedly having frequent sexual intercourse. The wife reported that when the patient would be at home he would insist for freq ...
... came to know about the patient’s excessive sexual indulgence with different women around six months back only from one of her female acquaintance with whom the patient was reportedly having frequent sexual intercourse. The wife reported that when the patient would be at home he would insist for freq ...
Chapter 14 Evolution a History and a Process—Reading/ Study Guide
... 2. Define mutation and explain how it relates to evolution. 3. Why are mutations particularly important, with respect to evolution, in organisms that reproduce asexually? Natural Selection and Fitness 1. How are the phrases “struggle for existence” and “survival of the fittest” misleading when it co ...
... 2. Define mutation and explain how it relates to evolution. 3. Why are mutations particularly important, with respect to evolution, in organisms that reproduce asexually? Natural Selection and Fitness 1. How are the phrases “struggle for existence” and “survival of the fittest” misleading when it co ...
Female Sexual Desire — Beyond Testosterone
... that a variety of chronic illnesses (diabetes, heart disease, rheumatic conditions) can contribute to an increase in reported problems (11). Cancer and its treatment cause many potential disruptions to the sexual response cycle in women. These disruptions include, but are not limited to, fatigue, de ...
... that a variety of chronic illnesses (diabetes, heart disease, rheumatic conditions) can contribute to an increase in reported problems (11). Cancer and its treatment cause many potential disruptions to the sexual response cycle in women. These disruptions include, but are not limited to, fatigue, de ...
Condition-dependent mutation rates and sexual selection
... by offspring. The majority of mutations are deleterious to fitness; so, some opposing force must maintain the mutation rate above zero. Selection can favour the spread of mutator alleles that elevate mutation rates, as a result of rare beneficial mutations that they create and hitch-hike with (e.g. ...
... by offspring. The majority of mutations are deleterious to fitness; so, some opposing force must maintain the mutation rate above zero. Selection can favour the spread of mutator alleles that elevate mutation rates, as a result of rare beneficial mutations that they create and hitch-hike with (e.g. ...
16.3 – Darwin Presents His Case Natural Selection
... Survival of the Fittest Fitness describes how well an organism can survive and reproduce in its environment. Individuals with characteristics that are well-suited to their environment – a have high fitness. Individuals with characteristics that are not well-suited to their environment – a have ...
... Survival of the Fittest Fitness describes how well an organism can survive and reproduce in its environment. Individuals with characteristics that are well-suited to their environment – a have high fitness. Individuals with characteristics that are not well-suited to their environment – a have ...
Fitness and Natural Selection - Gleason
... populations. The rate of reproduction of a phenotype – the intrinsic rate of increase of the life table for the phenotype – is a measure of its fitness. When differences in fitness among individuals have a genetic basis, those alleles that have the higher fitness reproduce faster and take over the p ...
... populations. The rate of reproduction of a phenotype – the intrinsic rate of increase of the life table for the phenotype – is a measure of its fitness. When differences in fitness among individuals have a genetic basis, those alleles that have the higher fitness reproduce faster and take over the p ...
Same-sex sexual behavior and evolution Nathan W. Bailey and Marlene Zuk Review
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
Same-sex sexual behavior and evolution
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
Sensory exploitation and sexual conflict
... Much of the literature on male–female coevolution concerns the processes by which male traits and female preferences for these can coevolve and be maintained by selection. There has been less explicit focus on the origin of male traits and female preferences. Here, I argue that it is important to di ...
... Much of the literature on male–female coevolution concerns the processes by which male traits and female preferences for these can coevolve and be maintained by selection. There has been less explicit focus on the origin of male traits and female preferences. Here, I argue that it is important to di ...
Same-sex sexual behavior and evolution
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
... behavior, sexual preference and sexual orientation are distinct but often conflated concepts (see Glossary). Confusion among them can undermine the clarity and accurate interpretation of scientific research, so here we emphasize that same-sex sexual behaviors are interactions between same-sex indivi ...
Speciation and Radiation in African Haplochromine Cichlids
... of a large number of other ecological variables. The distinctiveness of nuptialhue difference between sympatric species, the number of sympatric color morphs within a species, and the number of coexisting species within genera increased with the width of the ambient light spectrum. Moreover, the bri ...
... of a large number of other ecological variables. The distinctiveness of nuptialhue difference between sympatric species, the number of sympatric color morphs within a species, and the number of coexisting species within genera increased with the width of the ambient light spectrum. Moreover, the bri ...
013368718X_CH17_267
... The number of times an allele appears in a gene pool, compared to the total number of alleles in that pool for the same gene. A common group of genes, and all their alleles, shared by a population A trait controlled by two or more genes A trait controlled by only one gene A change in an allele’s fre ...
... The number of times an allele appears in a gene pool, compared to the total number of alleles in that pool for the same gene. A common group of genes, and all their alleles, shared by a population A trait controlled by two or more genes A trait controlled by only one gene A change in an allele’s fre ...
DARWINIAN EVOLUTION AND HUMAN RACE
... all synthetic thinkers, however, he was at the mercy of what went for established fact. He had been able personally to observe 10,000 barnacles for his impressive systematic survey of the Cirripedia, but when it came to the entire animal kingdom and the vast field of ethnographic research, he had t ...
... all synthetic thinkers, however, he was at the mercy of what went for established fact. He had been able personally to observe 10,000 barnacles for his impressive systematic survey of the Cirripedia, but when it came to the entire animal kingdom and the vast field of ethnographic research, he had t ...
Genetics and the causes of evolution: 150 years of progress since
... Darwin also pioneered the concept of sexual selection, according to which traits limited to males have evolved because they confer greater mating success, despite their negative effects on survival. After being neglected for nearly 100 years, this has become a major theme in evolutionary biology. Ed ...
... Darwin also pioneered the concept of sexual selection, according to which traits limited to males have evolved because they confer greater mating success, despite their negative effects on survival. After being neglected for nearly 100 years, this has become a major theme in evolutionary biology. Ed ...
Regaining your sexual dignity
... criticism, shame, withdrawal or even abuse. The child cannot understand that because its inner drive want to follow feelings of lust. It was good for the body and the development until now. But here, it learns that there must be something “charged”, something special about their genitals. If the chi ...
... criticism, shame, withdrawal or even abuse. The child cannot understand that because its inner drive want to follow feelings of lust. It was good for the body and the development until now. But here, it learns that there must be something “charged”, something special about their genitals. If the chi ...
Evolution Outline/Questions
... Lamark’s theory of “Inheritance of Acquired Characteristics” is for sure wrong because we know for a fact that a change to the animal’s body will not get passed on to the offspring unless it’s genetic. ...
... Lamark’s theory of “Inheritance of Acquired Characteristics” is for sure wrong because we know for a fact that a change to the animal’s body will not get passed on to the offspring unless it’s genetic. ...
Challenges to Neo- Darwinism and Their Meaning
... Randomness is a part of Darwinian theory, but it has a very definite and restricted role (lest the central premise of creativity for natural selection be compromised). It operates only in the genesis of raw material — genetic variation. It plays no role at all in the production of evolutionary chang ...
... Randomness is a part of Darwinian theory, but it has a very definite and restricted role (lest the central premise of creativity for natural selection be compromised). It operates only in the genesis of raw material — genetic variation. It plays no role at all in the production of evolutionary chang ...
lecture 02 - selection on the gene, genome, trait and phenotype
... Alleles or allele combinations, and the traits they produce, determine fitness of an individual: # of offspring that survive to reproduce - if you live forever but produce no offspring, your fitness = 0 Allele combinations resulting in higher fitness are passed to more offspring, and thus those alle ...
... Alleles or allele combinations, and the traits they produce, determine fitness of an individual: # of offspring that survive to reproduce - if you live forever but produce no offspring, your fitness = 0 Allele combinations resulting in higher fitness are passed to more offspring, and thus those alle ...
PSY 336 - Missouri State University
... Natural process If one allele (variant form of a gene) gives an advantage over other alleles, it will increase in frequency over generations. This changes the genotype (the genetic information of the organism) over many generations. ...
... Natural process If one allele (variant form of a gene) gives an advantage over other alleles, it will increase in frequency over generations. This changes the genotype (the genetic information of the organism) over many generations. ...
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.