A Tree of Genetic Traits

New Review

Some traits tend to show up in populations along with other specific traits. Why is this? Learners explore the phenomenon in part two of the eight-part Introduction to Heredity unit by identifying the presence of three traits: tongue rolling, PTC tasting, and earlobe attachment. They attach leaves to a tree to represent the presence of the traits and see patterns in how the traits appear in their populations, then conclude by discussing findings and creating a bar graph.

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CCSS: Adaptable
NGSS: Adaptable
Instructional Ideas

  • Invite other classes or members of the school to participate and add their information to the tree for a larger sample size
  • Identify other traits that pupils could test for and create multiple trees
Classroom Considerations

  • Requires materials not typically found in the classroom
Pros

  • Hands-on activity increases student engagement
  • Contains data analysis practice
Cons

  • None
Common Core