DNA Gel Electrophoresis
DNA Gel Electrophoresis for the Classroom
Resources for gel electrophoresis education by miniPCR bio™
Introduction to gel electrophoresis
Gel electrophoresis is one of the most accessible ways for students to experience real molecular biology. In a classroom, students can use gel electrophoresis to investigate genetics, DNA fingerprinting, forensics, conservation biology, biotechnology, and human health.
miniPCR bio provides gel electrophoresis equipment, reagents, classroom experiments, worksheets, and teacher resources for introducing electrophoresis from middle school through college-level biology and biotechnology.
What is gel electrophoresis?
Gel electrophoresis is a laboratory technique used to separate molecules by size. In DNA gel electrophoresis, an electric field moves negatively charged DNA fragments through an agarose gel. Smaller DNA fragments move more easily through the gel and travel farther than larger fragments.
Scientists use gel electrophoresis to separate and visualize DNA fragments, allowing them to compare samples, estimate DNA fragment sizes, and analyze genetic differences. A DNA ladder containing fragments of known sizes provides a reference for interpreting the bands produced by experimental samples.
Gel electrophoresis classroom activities
What is gel electrophoresis?
Gel electrophoresis is a laboratory technique used to separate DNA fragments by size and visualize the resulting DNA bands. In DNA gel electrophoresis, an electric field moves negatively charged DNA through an agarose gel. Smaller DNA fragments move more easily through the gel and travel farther than larger fragments. Free download.
Gel electrophoresis student worksheet
Help students practice the fundamentals of DNA gel electrophoresis, including how DNA moves through an agarose gel, how to use a DNA ladder to estimate fragment size, and how restriction enzymes change DNA banding patterns. Free download.
Gel electrophoresis kits for high school biology
DNA gel electrophoresis activities
| Topic | Example activity |
|---|---|
| Introduction to biotechnology | Molecular Rainbow Lab |
| Genetics | Dog Genetics Lab |
| Forensics | Wrongfully Convicted? |
| Human health | Sickle Cell Genetics Lab |
| Conservation | Lemur Lab |
| CRISPR | Chopped! |
| See all topics | Browse miniPCR Learning Labs |
Gel electrophoresis systems by miniPCR bio
| Electrophoresis system | Best for |
|---|---|
| Bandit Duo | Affordable, hands-on introduction to gel electrophoresis |
| blueGel | Classroom DNA gel electrophoresis and student labs |
| GELATO | Advanced teaching, research, and high-throughput electrophoresis |
Browse all miniPCR gel electrophoresis Learning Labs™
DNA Gel Electrophoresis
Dye Gel Electrophoresis
Gel electrophoresis classroom implementation tips
Gel electrophoresis is a foundational tool in molecular biology labs. Although the process can seem mysterious at first, the right visual explanations and hands-on narratives can make the technique come alive for students. To support biology instructors introducing this core biotechnology skill, we’ve collected four free resources that make gel electrophoresis more approachable, visual, and […]
Scientists use DNA gel electrophoresis to separate DNA fragments by size. An essential element of almost every gel electrophoresis experiment is the use of a DNA ladder or molecular weight marker that contains fragments of known sizes (molecular weights). How is band size determined on an electrophoresis gel? Comparing the migration distance of the DNA […]
What is a gel electrophoresis buffer? Image credit: Shutterstock A gel electrophoresis buffer is an electrolyte solution used in gel electrophoresis to provide a stable environment for the separation of nucleic acids. Salts in the buffer ensure that DNA molecules can move through the agarose gel matrix when an electric field is applied, while ions [...]
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