Can Modern Evolutionary Theory Explain Macroevolution?
... random in other respects), resulting in inherited variation that may be amplified by recombination; (3) natural selection (at the level of individual organisms), acting on inherited variation, is the major cause of evolution of adaptive characteristics; (4) changes in the genetic composition of popu ...
... random in other respects), resulting in inherited variation that may be amplified by recombination; (3) natural selection (at the level of individual organisms), acting on inherited variation, is the major cause of evolution of adaptive characteristics; (4) changes in the genetic composition of popu ...
Can Modern Evolutionary Theory Explain Macroevolution?
... random in other respects), resulting in inherited variation that may be amplified by recombination; (3) natural selection (at the level of individual organisms), acting on inherited variation, is the major cause of evolution of adaptive characteristics; (4) changes in the genetic composition of popu ...
... random in other respects), resulting in inherited variation that may be amplified by recombination; (3) natural selection (at the level of individual organisms), acting on inherited variation, is the major cause of evolution of adaptive characteristics; (4) changes in the genetic composition of popu ...
1 Possible consequences of genes of major effect
... (co)variation. When traits have an oligogenetic basis rather than matching the theoretical construct of the Gaussian infinitesimal model, changes in the G-matrix are expected during evolution (Barton & Turelli, 1987; Turelli, 1988; Barton & Turelli, 1989). Yet these 'expected' changes in the G-matri ...
... (co)variation. When traits have an oligogenetic basis rather than matching the theoretical construct of the Gaussian infinitesimal model, changes in the G-matrix are expected during evolution (Barton & Turelli, 1987; Turelli, 1988; Barton & Turelli, 1989). Yet these 'expected' changes in the G-matri ...
Different Evolutionary Paths to Complexity for Small and
... The relative importance of adaptive (i.e., selection) versus non-adaptive (i.e., drift) mechanisms in shaping the evolution of complexity is still a matter of contention among evolutionary biologists [1–6]. In molecular evolution, the role of non-adaptive evolutionary processes such as genetic drift ...
... The relative importance of adaptive (i.e., selection) versus non-adaptive (i.e., drift) mechanisms in shaping the evolution of complexity is still a matter of contention among evolutionary biologists [1–6]. In molecular evolution, the role of non-adaptive evolutionary processes such as genetic drift ...
Reviving the Superorganism
... that all evolved adaptations are brands of self-interest must be substantially modified if individuals sometimes function as "alleles" in group and community "organisms". A legitimate theory of superorganisms might therefore help correct certain excesses of the present. (v) Major terms surrounding t ...
... that all evolved adaptations are brands of self-interest must be substantially modified if individuals sometimes function as "alleles" in group and community "organisms". A legitimate theory of superorganisms might therefore help correct certain excesses of the present. (v) Major terms surrounding t ...
Natural selection and the origin and maintenance of standard
... been an extremely important selective factor in the evolution of many human populations in the tropical and subtropical regions of the Old World, and hence there may be many other polymorphisms adapted to it. Second, it pointed to the important role of infectious disease in general as a selective fo ...
... been an extremely important selective factor in the evolution of many human populations in the tropical and subtropical regions of the Old World, and hence there may be many other polymorphisms adapted to it. Second, it pointed to the important role of infectious disease in general as a selective fo ...
Systematics and evolutionary biology: uneasy bedfellows?
... the mammary glands of mammals, or the beaks of birds had “worked”. Nevertheless, for the discussion here, it is important to recognize that by centralizing developmental reorganization as the basis for evolutionary change, the saltationists were in diametric opposition to Darwin, not only in rejecti ...
... the mammary glands of mammals, or the beaks of birds had “worked”. Nevertheless, for the discussion here, it is important to recognize that by centralizing developmental reorganization as the basis for evolutionary change, the saltationists were in diametric opposition to Darwin, not only in rejecti ...
II. Hardy-Weinberg Principle, cont
... give them a higher probability of surviving and reproducing in a given environment tend to leave more offspring than other individuals. o This unequal ability of individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations. ...
... give them a higher probability of surviving and reproducing in a given environment tend to leave more offspring than other individuals. o This unequal ability of individuals to survive and reproduce will lead to the accumulation of favorable traits in the population over generations. ...
EVOLUTION EXPERIMENTS WITH MICROORGANISMS: THE DYNAMICS AND GENETIC BASES OF ADAPTATION
... A sample of the ancestral population is stored indefinitely (for example, frozen at –80 °C), as are samples from various time points in the experiment. After a population has been propagated for some time, the ancestral and derived genotypes can be compared with respect to any genetic or phenotypic ...
... A sample of the ancestral population is stored indefinitely (for example, frozen at –80 °C), as are samples from various time points in the experiment. After a population has been propagated for some time, the ancestral and derived genotypes can be compared with respect to any genetic or phenotypic ...
Conceptual Barriers to Progress Within Evolutionary Biology
... its explanatory power. We will suggest that the manner by which evolutionary biology currently depicts what on the surface are simple concepts such as ‘change’ and ‘cause’ reflects convention rather than natural truth. These problematic foundations constitute obstacles to further progress within evo ...
... its explanatory power. We will suggest that the manner by which evolutionary biology currently depicts what on the surface are simple concepts such as ‘change’ and ‘cause’ reflects convention rather than natural truth. These problematic foundations constitute obstacles to further progress within evo ...
Environment, Development, and Evolution
... Symbionts can be passed from generation to generation. Alleles in these symbionts can alter the phenotype of the holobiont and lead to selection of the holobiont based on the alleles of the symbiont. One example of symbionts conferring variation to the entire organism involves pea aphids and their s ...
... Symbionts can be passed from generation to generation. Alleles in these symbionts can alter the phenotype of the holobiont and lead to selection of the holobiont based on the alleles of the symbiont. One example of symbionts conferring variation to the entire organism involves pea aphids and their s ...
Inferring natural selection in a fossil threespine stickleback
... Mayr’s (1963) view that species represent wellintegrated genetic systems that become disrupted only during speciation. They concluded that macroevolution occurs during brief intervals of genetic instability (punctuations) and that long-term trends require species selection. Their claims generated he ...
... Mayr’s (1963) view that species represent wellintegrated genetic systems that become disrupted only during speciation. They concluded that macroevolution occurs during brief intervals of genetic instability (punctuations) and that long-term trends require species selection. Their claims generated he ...
indexto PR enti C ehallbiolog Y ( M ille R )
... Evolution is described in genetic terms. DNA models and ...
... Evolution is described in genetic terms. DNA models and ...
Speciation: New Migratory Direction Provides Route
... from one peak to the other. If the valley is shallow, the population can easily move by gradual change to the new peak; if the valley is deep, only a major mutation can move an individual to the new peak, but breeding between that individual and one on the original peak would likely produce offsprin ...
... from one peak to the other. If the valley is shallow, the population can easily move by gradual change to the new peak; if the valley is deep, only a major mutation can move an individual to the new peak, but breeding between that individual and one on the original peak would likely produce offsprin ...
as a PDF
... lakes (Fryer and Iles, 1972), and the hummingbird-Heliconia system (Temeles and Kress, 2003). Perhaps some potential phenotypes could have been even more successful (i.e. climbing higher adaptive peaks) in terms of matching functional design to a specific environment, but have not become established ...
... lakes (Fryer and Iles, 1972), and the hummingbird-Heliconia system (Temeles and Kress, 2003). Perhaps some potential phenotypes could have been even more successful (i.e. climbing higher adaptive peaks) in terms of matching functional design to a specific environment, but have not become established ...
The structure and development of evolutionary theory from a
... prediction, the hypothesis is falsified and needs to be adjusted or rejected and replaced. An honest and responsible scientist should make risky predictions and must be prepared to discard his hypothesis if the data does not agree with it. Although it is widely held, this is only one among several i ...
... prediction, the hypothesis is falsified and needs to be adjusted or rejected and replaced. An honest and responsible scientist should make risky predictions and must be prepared to discard his hypothesis if the data does not agree with it. Although it is widely held, this is only one among several i ...
Chapter 10 - Semantic Scholar
... attention is focused on tradeoffs that take one of three forms: (1) costs of functional traits, such as defense against enemies; (2) life-history tradeoffs within environments; and (3) adaptation to alternative environments (including the evolution of specialization, niche breadth, and range limits. ...
... attention is focused on tradeoffs that take one of three forms: (1) costs of functional traits, such as defense against enemies; (2) life-history tradeoffs within environments; and (3) adaptation to alternative environments (including the evolution of specialization, niche breadth, and range limits. ...
Evolutionary developmental biology: its
... about evolution in this era. In a letter from 1877, Zacharias describes how he came across, at the local marketplace, a pig with “thumbs,” which are normally completely absent, developed on both forelimbs. Such atavistic mutations, which bring forth characters that have long been lost in the evoluti ...
... about evolution in this era. In a letter from 1877, Zacharias describes how he came across, at the local marketplace, a pig with “thumbs,” which are normally completely absent, developed on both forelimbs. Such atavistic mutations, which bring forth characters that have long been lost in the evoluti ...
Full citation: Hamblin, Jacob D. (ed.), Roundtable Review of
... t one level Edmund Russell’s Evolutionary History is utterly conservative. Russell’s examination of “the ways populations of human beings and other species have shaped each other’s traits over time and th ...
... t one level Edmund Russell’s Evolutionary History is utterly conservative. Russell’s examination of “the ways populations of human beings and other species have shaped each other’s traits over time and th ...
Chapter 11: The Evolution of Populations
... • Mutation A mutation is a random change in the DNA of a gene. This change can form a new allele. Mutations in reproductive cells can be passed on to offspring. This increases the genetic variation in the gene pool. Because there are many genes in each individual and many individuals in a populati ...
... • Mutation A mutation is a random change in the DNA of a gene. This change can form a new allele. Mutations in reproductive cells can be passed on to offspring. This increases the genetic variation in the gene pool. Because there are many genes in each individual and many individuals in a populati ...
`Survival of the Fittest` in Darwinian Metaphysics: Tautology or
... Second, gene-Darwinism radicalizes the neo-Darwinian stress on natural selection by consistently advocating process reductionism, reducing all processes of infmmation gain to processes of natural selection. Although Darwin clearly regarded natural selection as the core of his theory, he still allowe ...
... Second, gene-Darwinism radicalizes the neo-Darwinian stress on natural selection by consistently advocating process reductionism, reducing all processes of infmmation gain to processes of natural selection. Although Darwin clearly regarded natural selection as the core of his theory, he still allowe ...
- Digital Commons @Brockport
... are three running speeds - Slow, Medium, and Fas'C - where the fittest of these three is coded by a heterozygote. If fast individuals have the Aa genotype, medium individuals have AA, and slow individuals have aa, then selection will not lead the population to evolve to the configuration of 100% Fas ...
... are three running speeds - Slow, Medium, and Fas'C - where the fittest of these three is coded by a heterozygote. If fast individuals have the Aa genotype, medium individuals have AA, and slow individuals have aa, then selection will not lead the population to evolve to the configuration of 100% Fas ...
Télécharger le pdf
... that follows a sudden and dramatic reduction in numbers or which follows as a result of a migration to a new territory. However, this must be seen as an exception which can never adequately explain the rule - and it could just as easily be used to defend the position that Nature intends to quickly e ...
... that follows a sudden and dramatic reduction in numbers or which follows as a result of a migration to a new territory. However, this must be seen as an exception which can never adequately explain the rule - and it could just as easily be used to defend the position that Nature intends to quickly e ...
Evolution of Darwin`s finches caused by a rare climatic event
... Populations of animals and plants often undergo conspicuous ecological changes when subjected to climatic extremes. Evolutionary changes may accompany them but are less easily detected. We show that Darwin's finches on a Galapagos island underwent two evolutionary changes after a severe El Nino even ...
... Populations of animals and plants often undergo conspicuous ecological changes when subjected to climatic extremes. Evolutionary changes may accompany them but are less easily detected. We show that Darwin's finches on a Galapagos island underwent two evolutionary changes after a severe El Nino even ...