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Yuck that tastes terrible: discovering a unique genetic trait.
In this genetic trait research activity, students will have fun discovering who makes a face when they taste PTC-treated strips. PTC (phenylthiocarbamide) is a chemical that has been widely used to detect genetic variation in tasting ability. Students will conduct the taste test experiment, gather data, use the Punnett square, graph the class findings, and design a simple research project to find correlations between tasters and non-tasters, and taste preferences or other genetic traits. In addition to experimental design, data collection, decision-making, and creativity, students will use interpersonal skills needed in STEM2D careers, such as presenting ideas, negotiating, organizing, and working as a collaborative team. This activity connects to Genes and Molecular Machines , SSEC curriculum.
This activity typically takes 1 hour to complete and should be done in one session.
Yuck! That Tastes Terrible: Discovering a Unique Genetic Trait is part of the STEM2D Student Activity Series. The content and layout were both developed by the Smithsonian Science Education Center as part of Johnson & Johnson's WiSTEM2D initiative (Women in Science, Technology, Engineering, Mathematics, Manufacturing, and Design), using a template provided by FHI 360 and JA Worldwide. This series includes a suite of interactive and fun, hands-on activities for girls (and boys), ages 5-18, globally.
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