Mississippi Science GEN.2B.4
The Standard
- GEN.2B
- Students will determine the causes and effects of mutations in DNA.
Investigate the role of mutations and the loss of cell cycle regulation in the development of cancers.
2026 Mississippi College- and Career-Readiness Standards for Science · Transcription, Translation, and Mutations
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students trace how DNA changes can disrupt genes that control cell division. They use a cell cycle model to explain how failed checkpoints can let abnormal cells keep dividing.
What Mastery Looks Like
- Given a mutation that disables a checkpoint gene, students can predict what happens to a cell with damaged DNA. They explain why repeated division can raise cancer risk, while most mutations do not cause cancer.
Common Misconceptions
- Students may think every DNA change causes cancer or that one mutation always makes a tumor. They may also think cancer mutations must be inherited, rather than arising in body cells.
How to Assess It
- Exit ticket: A mutation disables a gene that stops cells with damaged DNA from dividing. What could happen after several cell divisions, and why?
Lesson moves
Ways to Teach It
Move paper cells through a cell cycle mat, then remove a checkpoint gate and trace what happens when a DNA damage card appears.
Ask students to write: Why might one skin cell with DNA damage pause while a cell with a damaged checkpoint gene keeps dividing?
Sort scenario cards showing a disabled checkpoint, repaired DNA damage, and a harmless DNA change; identify which could allow unchecked division.
Use a sunscreen label and UV index report to explain how limiting UV exposure can lower DNA damage in skin cells.
Keep exploring
Related Standards
- GEN.2B.1
Identify factors that cause mutations (e.g., environmental, errors in replication, and viral infections).
- GEN.2B.3
Describe cellular mechanisms that can help to minimize mutations (e.g., cell cycle checkpoints, DNA polymerase proofreading, and DNA repair enzymes).
- FB.4.4
Obtain and communicate information to describe how mutations may affect genetic expression and provide examples.
- BIO.1E.2
Identify and describe the changes that occur in a cell during the cell cycle. Explore problems that might occur if the cell does not progress through the cycle ...
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