are made ahead of time). The kit, which must be stored in refrigerator, includes background information on DNA fingerprinting; 6 simulated DNA samples (2 from the crime scene and 4 from 2 different suspects); bottles of electrophoresis buffer and agarose; and micropipets. Also included are procedures for student experiments and guidelines for teachers, as well as a document on conducting agarose gel electrophoresis. Some other materials are required, such as an electrophoresis apparatus (M-12 or equivalent), a power supply, and distilled water.

Price: $45. Publisher/supplier: Sargent-Welch/VWR Scientific. Materials: Available locally, from commercial suppliers, or in kit.

2.74 Why Do People Look Different?

EDVO-Kit. West Bethesda, Md.: EDVOTEK, 1995.

Recommended grade level: 8+. Why Do People Look Different? is a kit containing lab materials and instructions for an activity that shows how DNA fingerprinting can be used to detect the genes inherited by children. Students load simulated DNA samples (dyes) from 2 brown-eyed parents and 4 children into wells in an agarose gel. Then they run the samples through an electrophoresis apparatus and analyze the results using their knowledge of Mendelian genetics. The object of the activity is to detect the alleles (genes) for eye color that are inherited by the children. The same exercise, however, would also apply if one were testing whether a person had a genetic disease or was a carrier for one.

This activity takes about 100 minutes (or less, if the buffers and gels are made ahead of time). The kit, which must be stored in a refrigerator, includes bottles of electrophoresis buffer and agarose, micropipets, and 6 simulated DNA samples. Also included are background information on DNA fingerprinting, procedures for student experiments, and guidelines for teachers, as well as a document on conducting agarose gel electrophoresis. Some other materials are required, such as an electrophoresis apparatus (M-12 or equivalent), a power supply, and distilled water.

Price: $45. Publisher/supplier: Sargent-Welch/VWR Scientific. Materials: Available locally, from commercial suppliers, or in kit.



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