Category Archives: Central Dogma

Central Dogma: Chromosome Project – Day 4

Today is the fourth and final day of working in the computer lab on the Chromosome Project.  Please download and complete the Day 4 Activity Log.  Students who complete the project before the end of the class period should share their expertise with classmates who would benefit from some additional help.  Remember, the purpose of this project is for each student to identify one disease caused by one gene on one chromosome.  Students are gaining a vast array of skills, including:

  • Using NCBI to research chromosomes, genes, and proteins;
  • Effective using the Internet searches research human diseases or conditions caused by inappropriate gene expression;
  • Applying project management skills to break down a large project into smaller units (the daily activity logs);
  • Working with Microsoft Word and PowerPoint to document and share learning;
  • Self-sufficiency by visiting the class website daily, and then reading and following complex written instructions;
  • Teamwork by sharing learning strategies with classmates working through similar learning challenges.

I am very proud of the work I have seen students accomplish over three short days.  Students have been presented with a variety of scheduling challenges, and several have also dealt with technological challenges.  I am impressed with the perseverance of my students and look forward to seeing their finished projects.

**Update: Because of the continued technology challenges, the final PowerPoint project is now worth 50 points, with additional credit awarded for presentations (+10 extra credit) and group participation (+10 extra credit) during presentations.  The reflection assignment (+10) was separately graded as well.

Central Dogma: Chromosome Project – Day 3

After two days in the computer lab, students should have compiled enough information for their Chromosome Project to complete page 1 of the PowerPoint template (goal #1).  Next, download and complete the Day 3 Activity Log.  The major focus of today is to identify credible scientific resources and find the information necessary to complete slides 2 and 3 of the PowerPoint.

  • Symptoms and characteristics of the disease/condition:
    • How does someone know they have the disease/condition?
    • What body systems are affected and how?
    • What tests are used to detect the disease/condition?
  • Who is affected?  Who is at risk for having the disease/condition
  • Outlook or quality of life:
    • What happens if the disease/condition goes untreated?
    • What treatment options are currently available?
    • How does treatment affect the disease/condition?
    • What treatment options may be available in the future?

Project scoring update: Many students were unable to locate their Day 1 Activity Log files, suggesting a problem with the student drives.  Out of fairness, the grading rubric will be updated as follows:

  • Minimum of 3 Daily Logs: 10 points per log (30 points total)
  • PowerPoint slides (50 points total)
  • Reflection (10 points)
  • Audience participation during presentations (10 points)
  • Presentation of PowerPoint (10 points of extra credit)

Central Dogma: Chromosome Project – Day 2

Students should download and complete the Day 2 Activity Log to document progress on the chromosome project, saving it to their student drive.  Please review the project description and grading rubric by visiting last Thursday’s post.

Ready to research a specific gene?  Head over to the NCBI Human Genome Resources page and enter your gene name into the “Find a Gene” box on the left panel.  Be sure to select “homo sapiens” in the pull-down box.  When the search completes, click on your gene name (typically the first gene on the list) and browse through the entry.  There is a ton of information provided!  The length of the gene can be found by hovering your mouse over the top green line under the “genomic regions, transcripts, and products” and looking for the number after the word “length.”  The length of the amino acid sequence can be found by clicking on the word “protein” on the right hand side of the page under Related Information.  Browse the entries for the full-length protein and note the number of amino acids in the protein.  The full-length protein can be challenging to find: look for an entry that does not include words like truncated, isoformpredicted, synthetic construct, or unnamed protein product.

Central Dogma: Chromosome Project Q&A

After spending a very productive first day in the computer lab, students now have the opportunity to ask clarifying questions about the Chromosome Project.  Students will be encouraged to share strategies for finding genes on chromosomes, and for identifying diseases associated with those genes.  Students will be ready to head back into the computer lab on Monday with an understanding of how to use the NCBI website for researching DNA and protein sequences.  Students will also be introduced to Cn3D, a special program that allows the user to visualize protein structure.  Students interested in learning more about how amino acids interact to form proteins are encouraged to experiment with Fold It, a game developed by the Baker Lab at the University of Washington.

Central Dogma: Quiz

Today’s quiz consisted of 8 multiple choice questions and 4 short answer questions.  Students were tested on knowledge of DNA structure, Central Dogma vocabulary, and knowledge of how DNA codes for proteins (with an emphasis on understanding the major types of DNA mutations and associated consequences to amino acid sequences).  Students were also challenged to explain how they might apply the power of genetics to solve a problem of interest to them.  After the quiz, students were assigned chromosomes in advance of tomorrow’s work on the Chromosome Project.  Tomorrow we will meet in computer lab 245.

Central Dogma: Case Study of Cystic Fibrosis

Because of the short week, today was a full schedule Friday.  We took advantage of the longer class period by learning about the stop codon, focusing on cystic fibrosis as a model disease caused by a genetic mutation which introduces a premature stop codon in about 10% of people with CF.  After watching an inspiring music video about a 15-year-old young man with CF, students learned more about the disease and genetic mutations in general.  We finished with a game where students practiced converting amino acid sequences to RNA and then replacing individual bases to create stop codons.  The lesson plan, along with example sequences from the game can be found here.

Central Dogma: The Double Helix

Content Objective: Describe the structure of chromosomes, DNA, genes, and proteins.

Language Objective: Explain the scientific process modeled by Watson & Crick.

Entry Task: Is failure part of the scientific process?  Why or why not?  Explain your thinking in at least 4 sentences.  Draw a picture for bonus points!

Students then watched The Double Helix video (below) and answered the worksheet questions.  After the video, we shared out responses to questions 1-10.

Central Dogma: Procedure Quiz

Students had the opportunity to demonstrate proficiency in the skill of writing a Procedure.  They were provided with an EOC-style procedure writing task directly related to the strawberry DNA extraction experiment from yesterday.  During the last 15 minutes of class, students watched the Stranger Visions video to learn how their human DNA can be used to construct 3-D printed models of faces.