Sympatric Speciation

Improved Essays
The modern synthesis for the evolutionary theory began from the coming together of Wallace’s, Mendel’s and Darwin’s thoughts concerning evolution as well as heredity along with the modern study for popular genetics. This describes the evolution of populations and species from the smaller changes among the individuals to large scale changes occurring over paleontological time periods. To be specific, current understanding on speciation arising from the concept of reproductive isolation and the gradual evolution of the reproductive isolating mechanisms helps one to appreciate the biological species concept. If two species share a common ancestor and are completely different, their allele frequencies has changed over time
A phylogeny arranges the species in order to reflect the relatedness by descent from a common ancestor. The closely related species came from a recent common ancestor are grouped together. The evolutionary distance can be represented using statistical means. As such, phylo-genetics is a mathematic field. This results in a tree or star shaped diagram (Baldauf, 2003). One problem would be to find the original common ancestral state that is likely to be extinct but can be
…show more content…
For allotropic speciation, there is a physical barrier which isolates the population and in sympatric speciation, it happens within one geographical area and a reproductive isolation comes between individuals which have the opportunity to interbreed (Weismann & Frederick 2002). The separation of a phylo-genetic coherent group of individuals into independent evolving lineages is the driving force for biodiversity. Considering geographic perspective major settings can result in speciation. These include sympatric speciation which is under debate because; this case does not involve geographic barriers which reduce the gene flow between the differentiating

Related Documents

  • Improved Essays

    By weeding out the weak or non-beneficial genes from the pool, large populations can quickly shift over short generational spans to press the most advantageous survival genetics into prevalence. There are three types of natural selection that occur in nature: directional selections, stabilizing selection and disruptive selection. Directional selections is directly tied to traits that affect physical characteristics such as size, color and pattern. These changes often occur quickly because they are directly responsible for survival of the population. Stabilizing selection occurs because certain traits have a higher survival chance such as the size of the organism effecting its ability to nourish itself and it’s young in a certain environment.…

    • 1103 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    The interaction process leads to mixing of the alleles of the organisms that are interacting. In the case of animals, the interaction process is facilitated by the migration of animals from place to another. So, the gene flow a result of the migration. The resultant effect of the flow of genes is that it alters the frequencies of the alleles in different populations with time. In adjacent populations, gene flow is likely to reduce variations.…

    • 964 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Measurable Outcomes

    • 1963 Words
    • 8 Pages

    Measurable Outcomes 1. Describe and demonstrate knowledge of modern evolutionary synthesis, natural selection, population genetics, micro and macroevolution, and speciation. I learned about the speciation of animals in Module 3 and in Module 4 I learned about modern evolutionary synthesis, natural selection, population genetics, and mirco and macroevolution. I was able to learn all this information due to the chapter 46 and chapter 47 notes, the online textbook, and the PowerPoint notes. This along with using reliable websites and articles is how I gathered my information on the concepts.…

    • 1963 Words
    • 8 Pages
    Improved Essays
  • Great Essays

    The subject of evolution is widely debated topic. However there is a wide variety of evidence that supports evolution. By studying the fossil record, comparative anatomy, genetics and natural selection scientists have been able to support Charles Darwin’s theory (evolution). This report will focus on evidence from the fossil record as well as genetics.…

    • 1222 Words
    • 5 Pages
    Great Essays
  • Superior Essays

    Scope Monkey Trial Essay

    • 1547 Words
    • 7 Pages

    Impact and Effects of the “Scope Monkey Trial” (1925) on Public Education Throughout United States history, the topic of evolution has been the center of a highly contested and controversial subject. Even when trying to define what evolution means, one is able to find many different definitions as well as opinions. However, for this paper, evolution will be defined as “Change from time in populations of living organisms; irreversible transformation in genetic compositions of populations” [Bolker (2017)]. The conversation of evolution has been around for hundreds of years, but it can be argued that the controversy of creation vs. evolution began in the early 19th century. The subject arose when Jean-Baptiste Lamarck proposed the idea…

    • 1547 Words
    • 7 Pages
    Superior Essays
  • Improved Essays

    Molecular Evolution studies, which use DNA sequence analysis, are used in the 21st century to determine the phylogenetic braches of the evolutionary tree of Life, based on evolutionary characteristic traits of organisms (Bock,…

    • 387 Words
    • 2 Pages
    Improved Essays
  • Great Essays

    How do scientists explain and support the argument for biological evolution? From the recent trip to the Minnesota Zoo, labs performed in class and multiple readings these things have shown students the dynamics of evolution. Scientists, like Charles Darwin, who have focused studies on certain organisms like the Galapagos Island finches have played a large role in our knowledge today about biological evolution, natural selection and descent with modification. Over many generations and an extended period of time the genetic change of an organism is bound to happen, these changes are called biological evolution.…

    • 1334 Words
    • 6 Pages
    Great Essays
  • Decent Essays

    Evolution Lab

    • 389 Words
    • 2 Pages

    In this lab, we used computer simulations to investigate about the forces of evolution. Evolution is when alleles changes over time in a population. There are four major forces of evolution. These forces may increase or decrease gene diversity, meaning they can introduce new alleles or extinct some alleles. One of the forces is mutation.…

    • 389 Words
    • 2 Pages
    Decent Essays
  • Great Essays

    Evolution is the theory used to describe exactly why life on earth changes the way it does. It is evident that all things change throughout time, but understanding the reason behind these changes can be infuriating. In Evolution for Everyone, David Sloane Wilson bonds the basic concepts of evolutionary theory with different disciplines such as: art, religion, language, and pro-social behaviors. Wilson establishes a unity between the evolutionary theory and the development of culture, language, art, and other disciplines. Wilson describes the basics of evolutionary theory for the readers who may not be well acquainted with it.…

    • 1026 Words
    • 5 Pages
    Great Essays
  • Improved Essays

    Dawkins pointed out that even though most of the genetic codes of all species are identical, only a very small fraction of these codes are differentiated for each species. As a result, these findings of the identical genetic codes can be linked to Dawkins’ statement based on this conclusion: “All earthly living things are certainly descended from a single ancestor” (Dawkins 12). We can trace back millions of years to determine the explanation concerning on how all species were considered as distant cousins, or that the genes from reproduction of these ancestors have drifted away into creating two species. Based from this, Dawkins refers to his analogy of a river that splits into two branches to clarify the scientific view on how species start to differentiate from one to another. In a similar fashion on how the two branches of rivers keep drifting further apart by time, he points out that the geographical separation along with longer periods of time is the reason that explains the differentiation of species.…

    • 782 Words
    • 4 Pages
    Improved Essays
  • Decent Essays

    A majority of childhood was giving librarians hell as I was striding through the corridors of Boston’s Hyde Park library, where my father consistently took me as a young boy in hopes to inspire me. As I ran around, I knock over a bookshelf and I noticed a book fell open with the picture of universal stars, . I seek to investigate more throughout future research. My father’s goal for my inspiration was reached.…

    • 494 Words
    • 2 Pages
    Decent Essays
  • Improved Essays

    The type of speciation that results when a species cannot mate due to a change in their use of a habitat is Sympatric speciation. Speciation, which ultimately makes the species to evolve into distinct species, occurs when members of the same species within a common habitat end up being reproductively isolated (Via). The speciation mostly occurs through polyploidy whereby offspring are produced with two times the normal chromosome number of other members of the same species. Normal members of the species would have two copies of the chromosome while on the other hand abnormal individuals would have four copies. The difference in the chromosome number leads to a failure in in mating thereby resulting to the evolution of the individuals into distinct…

    • 125 Words
    • 1 Pages
    Improved Essays
  • Improved Essays

    Genus Homo Evolution

    • 1376 Words
    • 6 Pages

    Since the emergence of the genus Homo, the hominins went through great patterns of evolution over generations. Through series of adaptations, the genus Homo spread in various geographic locations and eventually emerged as anatomically modern humans. With the allele frequency changes that evolved in the genus Homo, there is key evidence that microevolution led to macroevolution. From speciation to extinction, the modern synthesis helps us explain not only the mechanisms of evolution and the reproductive barriers between species, but also the various social adaptations that changed the hominins over time. From 2mya to ca.…

    • 1376 Words
    • 6 Pages
    Improved Essays
  • Improved Essays

    Human Brain Evolution

    • 957 Words
    • 4 Pages

    A change within the frequency of alleles in a population occurs on two distinct levels known as macro and microevolutions. The latter is explained as an alteration within a species’ environment that force adaptations in the group; a necessity for survival and reproduction. The evolution and adaptation of the human brain first occurred through a microevolution. As humans struggled to survive their brains grew and developed according to environmental changes; which are not always synonymous with a physical habitat.…

    • 957 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Recombinant Dna Synthesis

    • 1949 Words
    • 8 Pages

    Speciation is the origin of new species. Species are a group of closely related organisms. The Biological Species Concept is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring. Fertile means the ability to produce offspring. Viable is the capability of life.…

    • 1949 Words
    • 8 Pages
    Improved Essays

Related Topics