Sinjin Slade Edwards - Evolution Webquest 2018 McD.pdf - Name Date Period Evolution WebQuest Part A Flip through the University of Utah \u201cLearn

Sinjin Slade Edwards - Evolution Webquest 2018 McD.pdf -...

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Unformatted text preview: Name ____________________________________________ Date ___________________ Period ______ Evolution WebQuest Part A: Flip through the University of Utah “Learn Genetics” Lab (Recipe for Evolution) to answer the following questions. ​ 1. ​What three things make up the “recipe” for Evolution? ● Variation in living organisms ● Inheritance of variation from parents of offspring ● Natural Selection a. Variation i. What are the two modes of ​genetic variation​ of organisms? Mutation and recombination 1. _________________________ a. How would a mutation increase genetic variation? (​THINK​ about it! it’s not in the video) This mutation has introduced a new allele into the population that increases genetic variation and may be passes on to the next generation 2. _________________________ Genetic Recombination a. b. How would genetic recombination increase genetic variation? Increases the genetic diversity in sexually reproducing organisms and can allow an organism to function in new ways. b. Natural Selection i. What are three types of ​selection pressures​ that could act on and eliminate organisms with undesirable traits? 1. Stabilizing selection 2. Directional Selection 3. Disruptive Selection ii. Describe​ what happens to the organisms with the most favorable traits? It may allow the organism to better adapt to its enviroment and survive to reproduce iii. Summarize​ what is happening during natural selection (red/yellow slide). Natural selection doesn’t make organisms better just good enough to enable an organism to pass its genes to the next generation. Natural Selection also doesn’t move in a fixed direction. There is no one, perfect way of doing something. Natural Selection is simply a process that enables organisms to survive and reproduce in a local enviroment. c. Time i. Explain the role of time in evolution Biological evolution refers to the cumulative changes that occur in a population over time. These changes are produced at the genetic level as organisms' genes mutate and/or recombine in different ways during reproduction and are passed on to future generations. 2​. In your own words, how do the 3 parts of the “ evolution recipe” work together to evolve species and increase biodiversity. Part B:​ Learn about the basics of evolution at ​ 3​. What is evolution and what is it responsible for? is the process by which modern organisms have descended from ancient ancestors, its responsible for both remarkable similarities we see across all life and the amazing diversity of that life. 4​. [Click ‘next’] When does evolution take place? Evolution only occurs when there is a change in gene frequency within a population over time. 5​. Only inherited ______________________ differences that can be passed on are acted upon by evolution. geneti c 6​. Compare the two examples of changes in beetle populations. Which of the two scenarios is an example of evolution? ​Defend your answer with an explanation​. 7​. [Click ‘next’] Identify and describe the four basic mechanisms for evolutionary change​ in your own words! Mechanism Description Mutation are the ultimate source of new alleles in a gene pool. Migration Many animals move from one place to another at certain times of the year or during a particular period of their life cycle. Genetic Drift is the change in the frequency of an existing gene variant in a population due to random sampling of organisms. Natural Selection Natural selection is the process by which heritable traits increase an organism's chances of survival and reproduction. 8​. Genetic drift and natural selection only take place if there is Genetic drift causes evolution by random chance due to sampling error, whereas natural selection causes evolution ___________________ on the basis__________________. of fitness. 9​. [Click next several times to read about mutations] Now complete the paragraph below regarding gene flow. migration individuals “Gene flow, also called _________________, is any movement of ______________ from population one __________________ to another. Gene flow includes lots of different kinds of events, such pollen as _________________ being blown to a new destination or people moving to new cities or gene countries. If ______________ are carried to a population where those genes previously did not __________________, ____________________ can be a very important source of genetic exist gene flow ___________________. In the graphic on the website, the gene for _________________ variation brown coloration moves from one population to another.” 10​. [Click next and read until you get to Genetic Drift] Summarize the idea behind genetic drift. Genetic drift affects the genetic makeup of the population but, unlike natural selection, through an entirely random process. So although genetic drift is a mechanism of evolution, it doesn't work to produce adaptations. 11​. [Click next] Natural selection is the most important mechanism behind evolution. This webpage gives you an example of natural selection involving beetles. Read the descriptions and look at the cartoons. ​Explain what has happened to this population of beetles, using the following terms​: ​Adaptation, Survive, Reproduce, Gene, Natural Selection, Species, and Evolution. 12.​ How do the finches of the Galapagos Islands demonstrate evolution? the shape of finches' beaks on the Galapagos Islands has tracked weather patterns: after droughts, the finch population has deeper, stronger beaks that let them eat tougher seeds. 13​. [Click next] Fitness does not necessarily mean “strongest.” Defend this statement. A genotype's fitness includes its ability to survive, find a mate, produce offspring — and ultimately leave its genes in the next generation. ...
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