Strawberry Squish

Topic: In this team-based, hands-on activity, students extract DNA from smashed strawberries and learn how DNA and genes play an important role in human development.

Time: 60 minutes; implemented in one session

Materials:

• Computer with projector

• PowerPoint: Strawberry Squish

• Pre-Activity Checklist

• Tell My Story Form

• Hand wipes or paper towels (for clean-up)

• Cooler with ice or a refrigerator

• Pen/pencil (1 per student)

• Tablecloths (number will depend on tables being used)

• Strawberry Squish Challenge materials, 1 set of the following materials per activity leader (for demonstration) and 1 per team:

  • 5 mL (1 tsp) dish soap

  • 5 mL (1 tsp) cold rubbing alcohol (70% isopropyl alcohol on ice or in the refrigerator)

  • 45 mL (1.5 oz) water

  • 50-mL test tube containing 1/4 tsp NaCl (table salt)

  • Coffee filter

  • Paper cup

  • Plastic transfer pipette

  • Strawberry

  • Stir stick

  • Test tube rack

  • Resealable bag (sandwich size)

Cost: US$25 in material costs (excluding optional items) when completing this activity with 20 students organized into teams of two students.