ipl-logo

Evolutionary Forces: Natural Selection, Genetic Drift, And Gene Flow

336 Words2 Pages

ccording to lecture, the four mechanisms of evolutionary forces are mutation, natural selection, genetic drift, and gene flow. Mutation is defined by a change in the genetic code. This happens spontaneously. There are three major types of mutation. Point mutation is when there is a change in base substitution and may or may not produce a new amino acid. Frameshift mutation is when there is base insertion or deletion in the DNA. Lastly, chromosomal mutation is a change in one of the chromosomal pairs, such as a deletion, duplication, inversion, or translocation.
Natural Selection is a term coined by Charles Darwin that is best defined as the biological enhancement that increases the chance of survival from generation to generation (Kobari).

Show More
Related

  • Differences Between RNA And DNA

    811 Words  | 4 Pages

    The two main types of mutations are gene mutations and chromosomal mutations. Gene mutations are mutations that are involved with changes within one or few nucleotides. Chromosomal mutations are involved with the changes in the number or structure of chromosomes, which can change the location of genes on chromosomes as well as change the number of copies of some

    Read More

  • 6. Explain Why Evolution Often Selects Traits That Promote Genetic Diversity

    927 Words  | 4 Pages

    1. Explain why evolution often selects traits that promote genetic diversity. Evolution often selects traits that promote genetic diversity because genetic diversity boosts the chances that at least some members of the population will have a combination of traits that will allow them to survive and reproduce in a changing environment. Organisms that rely on asexual reproduction have virtually identical offspring, and they are successful in a stable environment; however, conditions rarely remain constant on Earth.

    Read More

  • Homozygous Natural Selection

    163 Words  | 1 Pages

    In this natural selection and genetics lab, a pair of alleles was randomly chosen from a cup of 100 alleles. There were 50 dominant and 50 recessive alleles. A pair of alleles was chosen randomly from the cup. The first time this was done all the organisms survived. The second time this was done the organisms that were homozygous recessive died due to the lack of an enzyme needed to digest grain.

    Read More

  • Cystic Fibrosis And Sickle Cell Anemia Essay

    793 Words  | 4 Pages

    Mutation can happen during cell division, when DNA is duplicated or also when DNA gets damaged by the lifestyle we choose and environmental factors, including UV radiation, chemicals, and viruses. Autosomal recessive disorders

    Read More

  • How Evolution Works Part 2 Analysis

    357 Words  | 2 Pages

    I think that the video, “How Evolution Works, Part 2” presented the case it was trying to make the best. I think that people cannot accept the theory of evolution if they only understand the contents of the Bible in a literal sense. I cannot accept much of the scientific knowledge currently in common use, not just evolution, but also when the earth was created. I think we can make a judgment that evolution and creationism are compatible by recognizing scientific facts and by how flexible the Bible is. Someone can ask if dinosaurs should come to the Bible if God made them.

    Read More

  • Misconception Of Darwin's Natural Selection Theoretical Analysis

    389 Words  | 2 Pages

    Many people have a misconception of Darwin’s natural selection theory, believing that nature specifically chooses the strongest organism of the bunch. What Darwin explains with this theory is that not the strongest organisms are the ones that manage to survive, but the organisms with the adequate traits are the ones that survive their environment. For example, if a lizard has the same skin color of the rocks in its environment, that lizard has a greater chance of surviving predators than lighter or darker color lizards. The lizard with the same color of the rocks may reproduce more because it is more suited for that environment than the other lizards. Roberto A. Frisancho explains that nature is the one responsible for natural selection, “Nature

    Read More

  • Explain The Steps That Are Necessary In Evolution By Natural Selection

    278 Words  | 2 Pages

    ¬ The steps that are necessary in evolution by natural selection are variation, heritability, differential reproduction and lastly the prevalence of the traits. Variation is essential for natural selection because as variations of certain traits are selected for or against across generations, the population is set to evolve. An example of this would be mutation. Mutation is a change at the genetic level which means a change in the DNA.

    Read More

  • Progression Inhibit Natural Selection

    953 Words  | 4 Pages

    Human-kind’s Progression Inhibits the Process of Natural Selection “How did your existence come about?” Is that a question you’ve ever pondered? Well the answer is very simple to that proposed question: for the most part all living species alive have been a direct result of natural selection. Natural selection - The process whereby organisms better adapted to their environment tend to survive and produce more offspring.

    Read More

  • Introductory Biology Student Evolution

    244 Words  | 1 Pages

    As a biology student, evolution was one of the first topics covered in my introductory biology classes at ASU. When I have been taught evolution it almost always begins with a tale about Darwin, the Galapagos Islands, and those magical finches. Using Darwin’s discovery, terms such as mutation, genetic drift, and adaptation were introduced to me. The basic consensus of evolution that I have gained from these biology courses is that species adapt to their environment in ways that allows them to survive more successfully. This ability to survive more effectively, allows these species to procreate more.

    Read More

  • Multiple Levels Of Natural Selection

    1135 Words  | 5 Pages

    Natural selection was first introduced by Charles Darwin; his studies of finches on the Galapagos Islands showed there are six different requirements for natural selection to occur. These requirements are: a population must reproduce, have genetic inheritance, overabundance of offspring, competition for the same resources, and lastly different variants must have different fitness (Berstrom & Dugatkin, 2012). Adaptations which are produced by natural selection, are features of an organism to survive and reproduce in its environment better than if it did not have that feature (Cotner & Moore, 2011). There are multiple levels of taxonomic hierarchy that natural selection affects. These levels include: gene cells, individuals, kin selection, and

    Read More

  • Microevolution: The Role Played By Natural Selection In Evolution

    1061 Words  | 5 Pages

    The Role Played by Natural Selection in Evolution. Evolution is the progression by which different kinds of living organism are thought to have developed from earlier forms during the history of the earth, which means it is the process of change in the inherited traits of a population of organisms from one generation to the next; the genes are passed on to the organism's offspring. [2] Microevolution happens on a small scale (in a single population). Microevolution is a change in gene frequency within a population, it can be observed over short periods of time such as between one generation and the offspring, for example the frequency of a gene for pesticide resistance in a population of crop pests can increase.

    Read More

  • Natural Selection Patterns Of Convergent Evolution

    811 Words  | 4 Pages

    This pattern of evolution, convergent evolution, arises when species are forced to adapt to similar environments, which can be due to Natural Selection (darwin ref). Natural Selection influences convergent evolution significantly. This is because it is the underlying mechanism behind this pattern of evolution. It influences convergence because it determines which traits are beneficial and will enable the individual to survive and reproduce, and which traits are not. “Natural selection is a process which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits” (bio book ref).

    Read More

  • Intelligent Design Vs Evolution Theory

    2195 Words  | 9 Pages

    Mutation refers to errors in copying the DNA sequence from parents to off-springs. Some of these errors may turn out to be beneficial to the organism for survival. Such characteristics are favoured and are passed on to the next generation. Accumulation of such new characteristics lead to emergence of a new species. This whole process is known as natural

    Read More

  • Natural Selection: Basic Mechanisms Of Evolution

    260 Words  | 2 Pages

    Natural Selection By: Matt Tiger Have you ever wondered what natural selection is? Natural selection is is one of the basic mechanisms of evolution, along with mutation, migration, and genetic drift. Natural selection was founded in 1859 by Charles Darwin, who defined natural selection as the "principle by which each slight variation, of a trait, if useful, is preserved". Natural selections was discovered when Darwin traveled to the Galapagos Islands and he noticed slight variations that made tortoises from different islands distinct.

    Read More

  • Darwin's Theory Of Evolution Vs Genetic Equilibrium

    332 Words  | 2 Pages

    Mutations can change the differences in the offspring, but sometimes the mutations can be bad. If the mutation was bad the organisms

    Read More

More about Evolutionary Forces: Natural Selection, Genetic Drift, And Gene Flow

Open Document