Observing The Cell Cycle Biology Worksheet Page 11
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29Investigation 11A
Observing Human Traits
11A Observing Human Traits
How much do traits vary in your classroom?
Traits are physical characteristics you inherit
Materials
from your parents. In this investigation, you will
• PTC paper
take an inventory of your observable traits and
• Pencils
compare these to the observable traits of your
• Calculator
classmates. You will then take inventory of
• Graph paper
students and teachers in your school. Finally,
you will determine the frequency of each trait in
your school’s population.
A
Observing your own traits
The graphic below shows seven different human traits. Each trait has two different forms.
Study the chart below, then follow the procedures carefully.
1. Working with a partner, observe which form you have for trait A through F. Circle
your form of each trait in Table 1.
NOTE: For finger hair, even if you have only one hair on any of your mid-digits, you
have finger hair.
2. Wash and dry your hands. For trait G, your teacher will give you and your partner a
piece of PTC paper. Taste the paper and circle your form of the trait in Table 1.
Safety tip: Never taste any substance in the laboratory unless directed by your teacher.
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