This lab turns the classroom into a biological "sampling site," allowing students to see how invisible genetic codes manifest as visible physical diversity within a community.

Activity Description

The Genetics Traits Survey is a data-collection lab that bridges the gap between individual genetics and population biology. By surveying traits like "Widow’s Peak" or "Attached Earlobes," students move from anecdotal observations ("My mom has dimples") to statistical realities. This activity highlights the concept of Phenotype Frequency—the idea that even though we all belong to the same species, the specific "versions" of traits we carry create a unique spectrum of variation.

� � Genetics Traits Survey Background Every organism has traits—observable characteristics like hair color, eye color, or the ability to roll your tongue. In a population, some traits are more common and some are less common, creating variation among individuals. By observing and recording traits in our class, we can explore how traits are distributed and which are more likely to appear in a group. Vocabulary Cloze Word Bank: trait, population, variation, dominant, recessive 1. A ________________ is a characteristic or feature of an organism, like eye color or the ability to roll your tongue. 2. A ________________ is a group of individuals of the same species, like all the students in our class. 3. ________________ refers to the differences in traits among individuals in a population. 4. A ________________ trait is more common in the population. 5. A ________________ trait is less common in the population. Materials Traits survey sheet (earlobes, dimples, chin, hairline, finger hair, thumb bend, PTC tasting), graph paper or digital spreadsheet, colored pencils or markers Procedure 1. Your group is assigned one trait from the survey list. 2. Collect data by tallying how many students in the class show each variation of the trait. 3. Record results in the class data table. 4. Make a graph (bar graph or pie chart) showing how common each variation is in the class. 5. Share your graph and results with the class. ● Draw a bar graph for a trait; give it a title and label the axes: x-axis = trait version, y-axis = number of students. Color the bars for clarity. Reflection Sentence Stems ● The trait we studied was ______________________________. ● The most common variation in our class was ________________________________________. ● The least common variation in our class was ________________________________________. ● This shows that traits can be ________________________________________________. ● Traits are inherited from ______________________, but not everyone has the same traits because ________________________________________________________. Reflection Sentence Stems ● The trait we studied was ______________________________. ● The most common variation in our class was ________________________________________. ● The least common variation in our class was ________________________________________. ● This shows that traits can be ________________________________________________. ● Traits are inherited from ______________________, but not everyone has the same traits because ________________________________________________________.