DNA Group Essay Questions
HL IB Biology I: DNA Essay -- Semester II
Choose ONE of the essays below to complete.
1. By using the techniques of genetic engineering, scientists are able to modify genetic materials so that a particular gene of interest from one cell can be incorporated into a different cell.
• Describe a procedure by which this can be done.
• Explain the purpose of each step of your procedure.
• Describe how you could determine whether the gene was successfully incorporated.
• Describe an example of how gene transfer and incorporation have been used in biomedical or commercial applications.
2. Assume that a particular genetic condition in a mammalian species causes an inability to digest starch. This disorder occurs with equal frequency in males and females. In most cases, neither parent of affected offspring has the condition.
• Describe the most probable pattern of inheritance for this condition. Explain your reasoning. Include in your discussion a sample cross(es) sufficient to verify your proposed pattern.
• Explain how a mutation could cause this inability to digest starch.
• Describe how modern techniques of molecular biology could be used to determine whether the mutant allele is present in a given individual.
3. Scientists seeking to determine which molecule is responsible for the transmission of characteristics from one generation to the next knew that the molecule must (1) copy itself precisely, (2) be stable but able to be changed, and (3) be complex enough to determine the organism’s phenotype.
• Explain how DNA meets each of the three criteria stated above.
• Select one of the criteria stated above and describe experimental evidence used to determine that DNA is the hereditary material.
4. What is genetic engineering and how does it work? Using the correct set of terms, describe the four steps of gene transfer using bacterial plasmids.
• How is genetic engineering used in medicine and society? Name four applications of genetic engineering techniques. Describe how one of these methods can be used.
• How is genetic engineering used in agriculture? Name two examples of the use of genetic engineering, one involving plants and the second involving animals. Describe one of these two techniques in greater detail.
Product Requirements:
o The paper should be a minimum of 4 pages in length (not including the work cited page) and should follow the proper rules of APA for in-text citations and work cited!
o The paper will need at least 4 references; two of these need to be books or journals
o Use Times New Roman size 12 font with double spacing and 1 inch margins
o Deadline for : ____________________
Rubric for IB Biology Essay
Format criteria - Typed; proper font, margins, and line spacing; four pages in length; all pages numbered and have students names; quotes or outside sources referenced in text; reference section done properly
Composition criteria- Grammar, punctuation, and spelling
Quality of Response criteria- Completeness and accuracy, thesis statement, references cited inside essay, written at appropriate level
An excellent report (grade=AD):
Format= all guidelines followed.
Composition= grammatically solid with no mistakes (use of complete sentences; proper punctuation; paragraphs that flow well; concepts don’t skip around)
Quality of response= proper use of biological terminology; writing reflects strong understanding of all aspects of question/problem with thesis; all aspects of solution are included and thorough; response is appropriate for IB Biology students.
A good report (grade= PR)
Format= most guidelines followed – missing one
Composition= grammatically moderate with one mistake (may be excellent in some aspect and poor in others; or just mediocre throughout).
Quality of response= many biological terms included and properly used; weak thesis; writing reflects understanding of many aspects of the problem or question; some aspects of solution are unclear or inaccurate; response level OK (more like high school level).
A poor report (grade= BA)
Format= most guidelines ignored – missing two (handwritten; wrong margins or font line spacing; not page numbered; students names not included; less than two or more than four pages in length; information not referenced; Not APA; reference section not APA).
Composition= grammatically poor throughout report with two mistakes(incomplete sentences; misspelled words; improper punctuation; concepts skip around).
Quality of response= biological terms lacking or misused; missing thesis; writing does not reflect understanding of most or all concepts of problem; most aspects of solution are lacking or inaccurate; response at inappropriate level.
A poor report (grade= MI)
Format= most guidelines ignored – missing three or more (handwritten; wrong margins or font line spacing; not page numbered; students names not included; less than two or more than four pages in length ;information not referenced; reference section missing).
Composition= grammatically poor throughout report with three or more mistakes (incomplete sentences; misspelled words; improper punctuation; concepts skip around).
Quality of response= biological not used; missing thesis; writing does not reflect understanding of most or all concepts of problem; inaccurate information; response at inappropriate level (i.e., grade school).
APA Citation Example: ALWAYS indent any line after the first line in work cited.
Example: book
Alexopoulos, R, Mims, C, and Blackwell, M. (1996). Introductory Mycology, 4th ed. Wiley & Sons, New York.
Example: internet
Gould, R.(2000). Cell Biology. Retrieved from
Example: journal
Smith, E, and Jones, K.(2001). Recycling of Nutrients in the Ocean. Nature 59 (3):21-24
HL IB Biology I: DNA Essay -- Semester II RETAKE
Select one genetic disorder that affects humans and do some research on it. Report the details of the disease’s general characteristics, how it can be detected (diagnosis), how the disorder is transferred through genetics, the results of the disorder, and any treatments or a prognosis of the disorder. Your research should include all of these elements but is not limited to just these details.
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