Name:___________________________ hour:______
Codominance and Incomplete Dominance
Part of our standards (what you need to learn this year) is to be able to describe heredity and how traits are passed
down using the following examples: eye color, widow’s peak, and blood type.
● Widow’s Peak: an example of mendelian genetics.
● Eye color: an example of incomplete dominance.
● Blood type: an example of codominance
We have already spent a few days doing punnett squares and examples of complete dominance (mendelian
genetics) in which the dominant trait completely masks the recessive trait. Not all genes have that characteristic.
Use your notes from today to complete the following examples for incomplete dominance and codominance.
1. What is the difference between complete dominance (mendelian genetics) and codominance? (use
complete sentences)
2. How is incomplete dominance different from complete dominance? (use complete sentences)
