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A new approach to course-based research using a hermit crab-hydrozoan symbiosisLearning ObjectivesStudents will be able to:
- define different types of symbiotic interactions, with specific examples.
- summarize and critically evaluate contemporary primary literature relevant to ecological symbioses, in particular that between hermit crabs and Hydractinia spp.
- articulate a question, based on observations of a natural phenomenon (in this example, the hermit crab-Hydractinia interaction).
- articulate a testable hypothesis, based on their own observations and read of the literature.
- design appropriate experimental or observational studies to address their hypotheses.
- collect and interpret data in light of their hypotheses.
- problem-solve and troubleshoot issues that arise during their experiment.
- communicate scientific results, both orally and in written form.
Using CRISPR-Cas9 to teach the fundamentals of molecular biology and experimental designLearning ObjectivesModule 1
- Generate a testable hypothesis that requires a creative design of reagents based on critical reading of and review of prior research.
- Demonstrate proficiency in using molecular cloning software to analyze, manipulate and verify DNA sequences.
- Predict the downstream effect on the mRNA and protein after successfully inserting a DNA repair template into the genome of a cell/organism.
- Compare and contrast the processes of DNA duplication and PCR.
- Demonstrate the ability to design primers to amplify a nucleotide sequence.
- Analyze and evaluate the results of DNA agarose gel electrophoresis.
- Identify the key features in genomic DNA, specifically those required for CRISPR-Cas9 mediated gene edits.
- Explain how compatible ends of DNA are used to produce recombinant DNA in a ligation reaction.
- Explain the chemical principles behind plasmid DNA purification from bacterial cultures.
- Devise a strategy to screen clones based on antibiotic selection and the mechanism of digestion by DNA endonucleases.
- Predict and evaluate the results of a diagnostic digest.
- Explain the chemical principles behind DNA purification using phenol-chloroform extraction and ethanol precipitation.
- Explain the key differences between DNA duplication and transcription.
- Demonstrate the ability to perform lab work with sterile technique.
- Compare and contrast the results of a non-denaturing vs. denaturing agarose gel.
- Evaluate the results of a denaturing agarose gel.
- Design and implement an experiment that tests the CRISPR-Cas9 principle.
- Predict the outcome of a successful in vitro Cas9 digest.
- Summarize important background information on gene of interest from analysis of primary literature.
- Produce figures and figure legends that clearly indicate results.
- Organize and construct a poster that clearly and professionally displays the important aspects of the lesson.
- Demonstrate understanding of the lesson by presenting a poster to an audience in lay terms, mid-level terms, or at an expert level.
- Demonstrate understanding of procedures by writing a formal materials and methods paper.
The Science Behind the ACTN3 PolymorphismLearning ObjectivesThis article accompanies the lesson "The ACTN3 Polymorphism: Applications in Genetics and Physiology Teaching Laboratories." Learning objectives for the lesson include:
- Test hypotheses related to the role of ACTN3 in skeletal muscle function.
- Explain how polymorphic variants of the ACTN3 gene affect protein structure and function.
- List and explain the differences between fast twitch and slow twitch muscle fibers.
- List and explain possible roles of the ACTN3 protein in skeletal muscle function.
- Find and analyze relevant scientific publications about the relationship between ACTN3 genotype and muscle function.
- Formulate hypotheses related to the relationship between ACTN3 genotype and skeletal muscle function.
- Design experiments to test hypotheses about the role of ACTN3 in skeletal muscle function.
- Statistically analyze experimental results using relevant software.
- Present experimental results in writing.
The Avocado Lab: An Inquiry-Driven Exploration of an Enzymatic Browning ReactionLearning ObjectivesStudents will be able to:
- develop a testable research question and supportive hypothesis regarding the browning of damaged avocado flesh caused by the activity of avocado polyphenol oxidase (aPPO).
- design and execute a well-controlled experiment to test aPPO hypotheses.
- evaluate qualitative enzyme activity data.
- create a figure and legend to present qualitative data that tests multiple hypotheses and variables.
- search for and correctly cite primary literature to support or refute hypotheses.
- know the role of reducing reagents, pH, chelators, and temperature in reactions catalyzed by aPPO.
- explain why the effects of salt and detergent differ for aPPO experiments conducted in situ
- (in mashed avocado flesh) as compared to in vitro (on purified protein).
- discuss how substrate and cofactor availability affect aPPO reactions.
- describe how endogenous subcellular organization restricts aPPO reactions in a healthy avocado.
- evaluate food handling practices for fruits expressing PPO.