Family Pedigree
We have examined examples of pedigrees during class,
now you will construct one for your own family.
You must choose one genetic trait that you can trace
through at least three generations. The trait that you
select must show some variation within the family
members, be observable and display characteristics of
a completely dominant or recessive trait. For example;
you should not choose a trait for tongue rolling if all
members of your family can roll their tongue.
Some possible traits that you may want to consider are:
tongue rolling, widow’s peak, hitch-hiker’s thumb or
colorblindness.
Guidelines:
 Pedigree should be displayed on at least an 11 X
14” paper. (5 points)
 The trait should be traced through at least three
generations. (10 points)
 Properly display males and females in the
pedigree. (5 points)
 Correctly represents the individuals that exhibit
the genetic trait. (10 points)
 Correctly identify the genotype of each individual
in the pedigree. (20 points)
 Genetic trait chosen shows variation within the
family and displays complete dominance or
recessive characteristics. (10 points)
Total 60 Points