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BIO 240 Crime Scene Forensics Worksheet

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how forensic scientists take advantage of genomic variations in noncoding regions of DNA

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the techniques of polymerase chain reaction (PCR) and gel electrophoresis

Introduction: In recent years, law enforcement has been revolutionized by molecular biology. When human tissues are left behind at crime scenes, these tissues can be collected and processed to yield samples of DNA, which can then be treated to isolate specific DNA fragments that are highly variable in the human population. Which band pattern among Lanes 3 to 6 seems to be the closest match to the band pattern in Lane 2, where the crime-scene DNA fragment was loaded? Which suspect appears to be the culprit? What is the molecular weight (in base pairs) of the fragment in Lane 2 (DNA from the crime scene), Lane 3 (Suspect 1), Lane 4 (Suspect 2), Lane 5 (Suspect 3), and Lane 6 (Suspect 4)? Part C How does analyzing DNA profiles using the gel electrophoresis tool allow you to draw both qualitative and quantitative conclusions about the likely identity of the suspect in this case?


Judging by the sizes of the fragments you measured in Part C, about how many repeats of the 16-base-pair sequence would you expect to find in each of the suspect’s genomes? In this lab activity, you targeted just one fragment of DNA to build the DNA profile of each suspect and the crime-scene sample. Real-world DNA profiles target multiple fragments. What is the advantage of targeting more than one fragment and having each DNA profile feature multiple bands? ********************************************************

BIO 240 Disruption of a Marine Food Web Worksheet

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Examine the graphs in the Lab Book, and describe any trends you observe among kelp, purple sea urchin, and sea otter populations. What happened to all three populations when catastrophe struck the sea otters? Which populations were wiped out, and in what order? Why do you think the removal of the otters caused the other two populations to crash as well?


Examine the graphs in the Lab Book. What happened to the populations’ growth patterns when 100 individuals of each species were reintroduced to the habitat? What would have happened if you had only reintroduced the kelp and the urchin? Explain. What if you had only reintroduced five individuals of each species? Would that have worked to restore the populations? Explain your hypothesis. Describe the results of the simulation. Was your hypothesis supported? ********************************************************

BIO 240 Entire Course

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BIO 240 Week 1 DQ 1 Cells BIO 240 Week 1 DQ 2 Virus BIO 240 Week 1 Comparing Cell Structures Worksheet BIO 240 Week 1 Photosynthesis and Respiration Paper BIO 240 Week 2 DQ 1


BIO 240 Week 2 DQ 2 BIO 240 Week 3 DQ 1 BIO 240 Week 3 DQ 2 BIO 240 Week 3 Learning Team Outline BIO 240 Week 3 DNA and Protein Synthesis BIO 240 Week 4 DQ 1 BIO 240 Week 4 DQ 2 BIO 240 Week 4 Natural Selection Paper BIO 240 Week 4 Individual Assignment Speciation Paper BIO 240 Week 5 Human Evolution Paper and Presentation BIO 240 Disruption of a Marine Food Web Worksheet BIO 240 Crime Scene Forensics Worksheet BIO 240 The Inheritance of Color Blindness Worksheet BIO 240 Introduction to Systematics Worksheet BIO 240 Invasive Species Worksheet ********************************************************

BIO 240 Introduction to Systematics Worksheet


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What three taxa appear in the main window when you first enter the Systematics Lab Room? At what level of classification are these three taxa? List one trait for each of these three taxa that distinguishes it from the others. Which of these organisms are included in Eukarya? Select all that apply. What groups did you click through to get to classes Mammalia and Reptilia? Which two of the following species are more closely related: red-eared slider, vampire bat, American alligator? What is the common name of the species you have arrived at? What is the name and level of the taxon where the two species’ lineages diverge? ********************************************************

BIO 240 Invasive Species Worksheet

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Describe the growth patterns of the mouse, cougar, and red-eared slider populations when pythons are not present.


Describe the growth of the Burmese python population immediately after they were introduced. What happened to the populations of the other animals? Suggest one reason why the introduction of Burmese pythons to this ecosystem may have caused the effects you observed.

What happened to the cougar and Burmese python populations when 80% of the Burmese pythons were removed? What do your observations reveal about the challenges involved in fighting invasive species? Based on your observations of Burmese python population trends, recommend a way managers could fight the Burmese python invasion in the Everglades. Explain your reasoning. ******************************************************** BIO 240 The Inheritance of Color Blindness Worksheet

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What percentage of Couple 1’s male offspring will be color blind? What percentage of their female offspring will be color blind? Couple 2 comes into your office. The husband is color blind; the wife is homozygous for the normal vision allele.


Couple 3 comes into your office. The husband is color blind; the wife is heterozygous for the color-blindness allele. Review the results you obtained for the female offspring of the three couples. Based on your results for the female offspring, predict whether color blindness is a dominant or recessive trait. Explain your reasoning. ******************************************************** BIO 240 Week 1 Comparing Cell Structures Worksheet

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Complete the following charts comparing prokaryotes and eukaryotes, plant and animal cells, and cells and viruses. ******************************************************** BIO 240 Week 1 DQ 1 Cells

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What are some of the ways cells communicate similar to the ways we humans communicate with other people or with an organization? How are they different?


******************************************************** BIO 240 Week 1 DQ 2 Virus

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Would you consider a virus living or non-living? Why? How does this agree or disagree with classification scheme applied by the scientific community? ******************************************************** BIO 240 Week 1 Photosynthesis and Respiration Paper

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Write a 700- to 1,050-word paper summarizing the events of cellular respiration and photosynthesis and examine the relationship between the two. Include the following in your paper: - For photosynthesis, include a summary of the events in: - The Light Dependent Reaction - The Calvin Cycle (Light Independent Reaction) - For cellular respiration, include a summary of the events in: - Glycolysis - Krebs Citric Acid Cycle


- The Electron Transport Chain - Examine the relationship between photosynthesis and cellular respiration. - Write the general formula for photosynthesis. - Write the general formula for cellular respiration. Explain the relationship between the two that should be obvious from the formulas. ******************************************************** BIO 240 Week 2 DQ 1

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There is a fierce competition among individuals within any species, humans included, to gain access to reproductive privileges. The “fittest” – a term that signifies the largest, prettiest, and most sexually attractive members, succeed in predominantly mating and having offspring, while the less attractive ones often do not. What is the role of such sexual selection from an evolutionary standpoint? Instead of engaging in fights over potential mates, what would be the problem of simply mating with family members, say, siblings and other relatives? Isn’t this a more efficient way to spread genes, without the added peril of having to find potential mates, which could be a dangerous, strenuous, and uncertain activity? Why not take that and "run?" ******************************************************** BIO 240 Week 2 DQ 2

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Would two identical twins growing up in different neighborhood grow up differently? ******************************************************** BIO 240 Week 3 DNA and Protein Synthesis

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Answer the following questions, in a total of 500 to 700 words. - Describe the structure of DNA and the steps of protein synthesis. - Describe the relationships between the following terms: - DNA - Chromatin material - Gene - Chromosome - Use the following gene in protein synthesis: TAGGACCATTTTAGCCCC - Show the mRNA. - Show the tRNA. - Name the amino acids that will be placed in the polypeptide chain. (Use the codon table in Ch. 17 of Campbell Biology.) - A gene will direct the making of polypeptide chains, and polypeptide chains form proteins. All enzymes are proteins. Therefore, how would you explain carrying a gene for a trait that does not show up in the offspring? - In order for DNA to pass genetic information to the next generation, DNA must replicate successfully. Mistakes in replication could result in major problems in heredity.


- Explain how DNA replicates. - Describe the formation of the leading strand and lagging strand and include the enzymes involved. Why do the legs replicate differently?

******************************************************** BIO 240 Week 3 DQ 1 For more classes visit www.snaptutorial.com

Craig Venter made a new life form (a bacterium) from scratch – essentially from computer database, and a few bottles of chemicals: http://www.csmonitor.com/Science/2010/0521/J.-Craig-Venter-Institute-createsfirst-synthetic-life-form http://www.nytimes.com/2010/05/21/science/21cell.html If these and other such DNA-based technologies become widely used, how might they change the way evolution proceeds, as compared with the natural evolutionary mechanisms of the past almost 4 billion years?

******************************************************** BIO 240 Week 3 DQ 2

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Is there danger of discrimination based on testing for “harmful” genes? Would you support cloning of life forms? How about a human clone? What policies can you suggest that would prevent or permit such practices? ******************************************************** BIO 240 Week 3 Learning Team Outline

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Submit a minimum of one page draft outline for your Learning Team’s projects. Refer to instructions on final assignment provided under Week 5 details to assist in your research. Any one team member may submit this to the Assignment link.

******************************************************** BIO 240 Week 4 DQ 1

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Consider the human eye, an exquisitely adapted organ that gives rise to stereo vision in full color (see, for instance, “The Evolution of Primate Color Vision” by Gerald H. Jacobs and Jeremy Nathans, Scientific American, April 2009 issue, pp. 56-63). Explain, strictly from within the framework of Darwinian evolution, how natural selection “crafted” such an organ. ******************************************************** BIO 240 Week 4 DQ 2

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How do you think we could trace back the evolution of organs within our body by hundreds of millions of years – from our reptile ancestors – by examining coevolution patterns and fitness landscapes? Discuss, for instance, the “missing link,” Tiktaalik, that has made headlines around the world (see “Your Inner Fish” by Neil Shubin). What kind of selection pressures could have been at work here, based on species adaptations, climate changes, and shifting landmasses?

******************************************************** BIO 240 Week 4 Individual Assignment Speciation Paper


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Summarize three methods that could produce a new species from an existing species and provide examples, in 700 to 1050 words. Include a summary and specific examples: Allopatric speciation Sympatric speciation Polyploidy Include at least three references. Format your paper consistent with APA guidelines ******************************************************** BIO 240 Week 4 Natural Selection Paper

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Write a 1,500- to 1,800-word paper that describes Darwin’s mechanism of evolution by natural selection. Include the following points in your paper: · An explanation of Darwin’s assumptions and inferences based on his major


observations. · An example of how natural selection may have worked in a population (for example, moth in New England, drug-resistant bacteria, giraffes, finches in the Galapagos Islands, or another species you select) · An explanation of how adaptations help species survive such as mimicry and camouflage. Give examples of several adaptations and explain how they enhance survival of the species. · What evidence is there to support Darwin’s theory of evolution by natural selection? Describe the evidence. Include a reference page with at least three outside references. Format your paper consistent with APA guidelines.

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BIO 240 Week 5 Human Evolution Paper and Presentation For more classes visit www.snaptutorial.com

Prepare a 2,000 to 2,500-word paper, with at least five outside references, in which you examine evolution of our species as we spread across the world. In your paper, be sure to include the following items: - The origin and evolution of vertebrates. - Description of the primate adaptations for living in trees. - Comparison of the three main groups of primates, noting examples of each. - An explanation as to why it is incorrect to consider: (a) chimpanzees as our ancestors, (b) human evolution as a ladder, and (c) human traits evolved together. - Description of the traits of and the relationships between each of the following species: Australopithecus afarensis, Homo habilis, Homo erectus, and Homo


sapiens. Format your paper consistent with APA guidelines. Submit your Human Evolution paper. As a learning team, create a20-25-slide Microsoft® PowerPoint® presentation in which you address each of the above points in your paper. Your presentation will require presenter notes to go with it, and should be able to convey the “story” of human evolution as described in your paper, and as it relates to us. You will need to include at least five outside references. Submit your Human Evolution PowerPoint® presentation ********************************************************

Bio 240 possible is everything snaptutorial com  

For more classes visit www.snaptutorial.com • how forensic scientists take advantage of genomic variations in noncoding regions of DNA • th...

Bio 240 possible is everything snaptutorial com  

For more classes visit www.snaptutorial.com • how forensic scientists take advantage of genomic variations in noncoding regions of DNA • th...

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