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Activities and Experiments

Lesson 3: Genetics

Note: This is an abbreviated list
from the activities listed on the website.

Family Pedigree

Before starting this science project, you should go through your reference
material and familiarize yourself with the proper way to draw a human
pedigree.

1. To start this project, draw a pedigree showing the different members
of your family.

a. Include as many family members as you can get data from. The
more people and generations you include, the more likely it is
that you'll have enough information to determine the mode of
inheritance.

b. You might need help from your parents to figure out all the
relationships.

2. If you have access to a photocopier, make four copies of the
pedigree—one for each trait you are going to evaluate. If photocopying
isn't an option, manually copy the pedigree.

3. Determine the phenotype of each person on your pedigree for each of
the four traits. Use a separate pedigree for each trait. Examples are:
eye-color, hair color, widow’s peak, height. Note: Widow's peak can
vary considerably; score any sort of V-shaped hairline as positive.

4. From your pedigrees, can you deduce the mode of inheritance for each
trait? For which traits is your pedigree informative? If you don't have
enough information to determine the mode of inheritance of a
particular trait, try making a pedigree for another family.

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