Tag: nucleotide
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Thymine Dimers & DNA Repair
Teaching DNA damage and repair can feel abstract for students, until they can clearly visualize and apply it. This classroom-ready activity helps students understand thymine dimers and nucleotide excision repair (NER) through diagram analysis, structured questions, and real-world connections. By focusing on how DNA is damaged by UV radiation and how cells fix that damage,…
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Dog SNPs and Curly Hair
In an effort to add more real data to the DNA (genetics) unit, I added a shortened form of the HHMI activity: “Mapping Genes to Traits in Dogs Using SNPs” The activity on HHMI is too advanced for freshman level biology, but I thought it would be a good introduction to DNA sequences. The activity…
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Construct a DNA Model Using Marshmallows
Use marshmallows and toothpicks to construct a model of DNA. Mini marshmallows represents the nucleotides, large marshmallows represent deoxyribose.