Selection and Evolution with a Deck of Cards
... that can be explained by genetic variation (heritability). In the third step, we artificially select against a portion of the class and the students calculate the selection differential. At this point, students make a quantitative prediction about what the average trait value should be in the next g ...
... that can be explained by genetic variation (heritability). In the third step, we artificially select against a portion of the class and the students calculate the selection differential. At this point, students make a quantitative prediction about what the average trait value should be in the next g ...
Slide 1
... C2: As a result of this variation, some organisms will be more likely to survive and reproduce than others – there will be differential reproductive success. C3: The population change through time, as adaptive traits accumulate in the population. Corollary: Two populations, isolated in different env ...
... C2: As a result of this variation, some organisms will be more likely to survive and reproduce than others – there will be differential reproductive success. C3: The population change through time, as adaptive traits accumulate in the population. Corollary: Two populations, isolated in different env ...
16.2 and 16.3 Notes
... genetics, have been added to his theory to explain the evolution of species. • Because it affects every aspect of biology, scientists can study evolution at many scales. Generally, these scales range from microevolution to macroevolution, with speciation in between. ...
... genetics, have been added to his theory to explain the evolution of species. • Because it affects every aspect of biology, scientists can study evolution at many scales. Generally, these scales range from microevolution to macroevolution, with speciation in between. ...
Directional Selection on a discrete trait
... appears to protect against smallpox and HIV HIV has no receptor to bind to and cannot enter the cell This allele is found in 14% of Europeans HIV can impose selective pressure for CCR5-Δ32, increasing the frequency of this allele in human populations (Sullivan et ...
... appears to protect against smallpox and HIV HIV has no receptor to bind to and cannot enter the cell This allele is found in 14% of Europeans HIV can impose selective pressure for CCR5-Δ32, increasing the frequency of this allele in human populations (Sullivan et ...
“how-to guide” sexual health check-up
... high compared to other developed nations, such as Australia and the United Kingdom. Chlamydia is the most commonly reported STI in New Zealand, with a reported incidence in 2011 of 786 new cases per 100 000 people.1 More than 70% of reported chlamydia infections occurred in people aged 15 – 24 years ...
... high compared to other developed nations, such as Australia and the United Kingdom. Chlamydia is the most commonly reported STI in New Zealand, with a reported incidence in 2011 of 786 new cases per 100 000 people.1 More than 70% of reported chlamydia infections occurred in people aged 15 – 24 years ...
What is `Natural` in Natural Selection? To understand Darwin`s
... will be naturally selected: compared to the others in the population, they will naturally outgrow in numbers7. Note that, in the second instance, unlike the first, there is no change in the external conditions, and still there is natural selection. Profitability or usefulness of a variation for the ...
... will be naturally selected: compared to the others in the population, they will naturally outgrow in numbers7. Note that, in the second instance, unlike the first, there is no change in the external conditions, and still there is natural selection. Profitability or usefulness of a variation for the ...
Malthus, Darwin, and Natural selection: an historical introduction to
... species of flowering plant in captivity. For their purposes, the optimum environment is the one that maximizes the growth rate of the captive population allowing more individuals to be released into the wild in each generation. To this end, they estimated life table data for two cohorts (each of siz ...
... species of flowering plant in captivity. For their purposes, the optimum environment is the one that maximizes the growth rate of the captive population allowing more individuals to be released into the wild in each generation. To this end, they estimated life table data for two cohorts (each of siz ...
The evolution of the G matrix: selection or drift?
... When genetic correlations arise principally from pleiotropy, populations are large and mating is random, the G matrix is determined by the joint eects of pleiotropic mutation and multivariate selection (Lande, 1980). Changes in the selective regime will produce changes in G but there is no a priori ...
... When genetic correlations arise principally from pleiotropy, populations are large and mating is random, the G matrix is determined by the joint eects of pleiotropic mutation and multivariate selection (Lande, 1980). Changes in the selective regime will produce changes in G but there is no a priori ...
File - Queen of the South
... The genesis of completely new classes of living things from preexisting ones precedes any natural selection within already formed species and is still shrouded in mystery. If, as thought and taught by many scientists, the process were gradual, being built up by a series of small adaptive changes, th ...
... The genesis of completely new classes of living things from preexisting ones precedes any natural selection within already formed species and is still shrouded in mystery. If, as thought and taught by many scientists, the process were gradual, being built up by a series of small adaptive changes, th ...
intraspecific variation in sexual isolation in the
... (1) intraspecific variation in reproductive isolation between populations within a species (incipient speciation); (2) intraspecific variation in reproductive isolation to closely related species (variable interspecific isolation). Studies of sexual isolation have characterized both patterns of intr ...
... (1) intraspecific variation in reproductive isolation between populations within a species (incipient speciation); (2) intraspecific variation in reproductive isolation to closely related species (variable interspecific isolation). Studies of sexual isolation have characterized both patterns of intr ...
Lamarck
... • Geology: Darwin had Lyell’s Principles of Geology on board the HMS Beagle • Lamarck ’s (1744-1829) Theory of Evolution Inheritance of acquired characteristics • Malthus (1766-1834): Competition within species and struggle for survival ...
... • Geology: Darwin had Lyell’s Principles of Geology on board the HMS Beagle • Lamarck ’s (1744-1829) Theory of Evolution Inheritance of acquired characteristics • Malthus (1766-1834): Competition within species and struggle for survival ...
Document
... • Geology: Darwin had Lyell’s Principles of Geology on board the HMS Beagle • Lamarck ’s (1744-1829) Theory of Evolution Inheritance of acquired characteristics • Malthus (1766-1834): Competition within species and struggle for survival ...
... • Geology: Darwin had Lyell’s Principles of Geology on board the HMS Beagle • Lamarck ’s (1744-1829) Theory of Evolution Inheritance of acquired characteristics • Malthus (1766-1834): Competition within species and struggle for survival ...
fitness landscapes in orchids
... mathematical equations. Consequently, they require assumptions on how natural selection functions, the most serious of which is that phenotypic and natural selection follow pre-established mathematical equations. In a simple example, let us assume that plants with larger inflorescences have higher f ...
... mathematical equations. Consequently, they require assumptions on how natural selection functions, the most serious of which is that phenotypic and natural selection follow pre-established mathematical equations. In a simple example, let us assume that plants with larger inflorescences have higher f ...
HELPFUL AND HARMFUL REACTIONS
... 1 in 4 women and 1 in 6 men will experience some form of sexual assault in their lifetime - there is a good chance that someone close to you is a survivor. Survivors are often blamed for their own sexual assault, discouraged from speaking out, and are often faced with disbelief or are not taken seri ...
... 1 in 4 women and 1 in 6 men will experience some form of sexual assault in their lifetime - there is a good chance that someone close to you is a survivor. Survivors are often blamed for their own sexual assault, discouraged from speaking out, and are often faced with disbelief or are not taken seri ...
Artificial and Natural selection
... These changes increase a species’ fitness in its environment. ...
... These changes increase a species’ fitness in its environment. ...
Gale Power Search
... Who was Charles Darwin? The theory of natural selection proposed by Charles Darwin (1809-1882) revolutionized all aspects of natural science. Darwin was born into a family of physicians and planned to follow his father and grandfather in that profession. Unable to stand the sight of blood, he studie ...
... Who was Charles Darwin? The theory of natural selection proposed by Charles Darwin (1809-1882) revolutionized all aspects of natural science. Darwin was born into a family of physicians and planned to follow his father and grandfather in that profession. Unable to stand the sight of blood, he studie ...
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 ...
17-2
... assessment to determine whether they understand the role of chance events in the evolution of small populations. Have pairs of students use coin tosses to simulate the effects of chance on the allele frequencies in a population of 10 individuals. In the first generation, there are 10 “heads” alleles ...
... assessment to determine whether they understand the role of chance events in the evolution of small populations. Have pairs of students use coin tosses to simulate the effects of chance on the allele frequencies in a population of 10 individuals. In the first generation, there are 10 “heads” alleles ...
Sexual Fetishism in Adolescence: Report of Two Cases
... have past neurological history or current signs/ symptoms suggestive of a neurological disorder, and due to his typical clinical picture suggesting sexual fetishism, no further imaging studies were conducted. During psychiatric interviews, he genuinely admitted having this interest and stealing al ...
... have past neurological history or current signs/ symptoms suggestive of a neurological disorder, and due to his typical clinical picture suggesting sexual fetishism, no further imaging studies were conducted. During psychiatric interviews, he genuinely admitted having this interest and stealing al ...
Darwin`s Theory of Evolution
... Lamarck’s Evolutionary Hypothesis Jean-Baptiste Lamarck was one of the first scientists to propose hypotheses about how evolution occurred. ▶ To explain evolution, Lamarck hypothesized that all organisms have an inborn drive to become more complex and perfect. According to Lamarck, an organism could ...
... Lamarck’s Evolutionary Hypothesis Jean-Baptiste Lamarck was one of the first scientists to propose hypotheses about how evolution occurred. ▶ To explain evolution, Lamarck hypothesized that all organisms have an inborn drive to become more complex and perfect. According to Lamarck, an organism could ...
AP Psychology Review 7: Motivation and Emotion
... Def: The influences that account for the initiation, direction, intensity, and persistence of behavior EX: In their 40’s or 50’s, many men go through a mid-life crisis. Therefore, they may make some strange decisions based on this motivation. ...
... Def: The influences that account for the initiation, direction, intensity, and persistence of behavior EX: In their 40’s or 50’s, many men go through a mid-life crisis. Therefore, they may make some strange decisions based on this motivation. ...
Do exaggerated sexual swellings function in female mating
... van Schaik et al., 2000). Identification of species that have exaggerated swellings was based on Nunn (1999a). This source used a three-part definition of exaggerated swellings: (1) either adults or adolescents (or both) undergo visible changes in a specialized ‘‘sexual skin’’ over the course of the ...
... van Schaik et al., 2000). Identification of species that have exaggerated swellings was based on Nunn (1999a). This source used a three-part definition of exaggerated swellings: (1) either adults or adolescents (or both) undergo visible changes in a specialized ‘‘sexual skin’’ over the course of the ...
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.