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Ward's® Phenotype Expression Lab Activity

Investigate Transformation, a Basic Principle of Genetic Engineering

  • Genetically engineer non-pathogenic bacteria
  • Materials for 5 lab groups
  • Time Required: 90 minutes
In this experiment, the bacteria E. coli JM 101, which is sensitive to ampicillin and incapable of producing beta-galactosidase needed for lactose breakdown, is transformed by insertion of the pUC8 plasmid, receiving antibiotic resistance as well as the lac+ phenotype. In two 45-minute lab sessions, the traits are transferred, and the transformed cells are grown on agar plates containing the antibiotic and on plates with ampicillin and x-gal, a histochemical substrate for β; -galactosidase that yields a blue precipitate upon hydrolysis. Transformants appear as white colonies on plates with ampicillin and blue colonies on plates with ampicillin and x-gal. It comes with enough materials for five setups, as well as a teacher’s guide and student copymaster.

Materials required, not included: incubator and a microcentrifuge

Ordering information: Coupon is included for redemption of perishable materials. Redeem by mail, phone, fax, or email.



Item # Description No. of Lab Groups Unit Availability Price Quantity
470030-382 Phenotype Expression Kit
5 Kit of 1 Retrieving Restricted
restricted This product is marked as restricted and can only be purchased by approved Shipping Accounts. To apply for a shipping account number, click here. If you need further assistance, call Customer Service at 800-962-2660 or email


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