Close, Closer, Closest

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In this activity, learners perform an experiment that models a chromatography-like process called electrophoresis, a process used to analyze DNA. Learners examine coffee filter strips, each dotted with mock "DNA" (food coloring dyes diluted with water), as they separate into components when placed in water. This process mirrors restriction mapping techniques used to analyze an animal's genetic makeup. This resource also includes two simple ways of demonstrating gene splicing.

Quick Guide

Preparation Time:
10 to 30 minutes
Learning Time:
10 to 30 minutes
Estimated Materials Cost:
1 cent - $1 per student
Age Range:
Ages 8 - 18
Resource Types:
Activity, Experiment/Lab Activity, Lesson/Lesson Plan, Simulation
Language:
English

Materials List (per student)

  • Mock DNA solutions-two or more food coloring dyes diluted with water
  • coffee filters or paper towels
  • scissors
  • straw
  • container for water
  • paper clips

Keywords

Subjects

  • Life Sciences
    • Cells
    • Diversity of Life
      • Animals
    • Heredity and Genetics
      • Patterns of Heredity
      • DNA Structure and Function
  • Physical Sciences
    • Chemistry
  • The Nature of Science
    • The Scientific Process
      • Conducting Investigations
      • Gathering Data
      • Formulating Explanations
      • Communicating Results

Informal Categories

  • Animals

Audience

To use this activity, learners need to:

  • see
  • see color
  • touch

Learning styles supported:

  • Involves hands-on or lab activities

Other

This resource is part of:

Access Rights:

  • Free access

By:

  • Scientific American Frontiers Online

Rights: