Which of the Following is an Example of Incomplete Dominance

Question

Which of the following is an example of incomplete dominance?  
A) ABO blood system
B) Huntington's disease
C) Pink roses
D) Calico cat coat color
E) Tall pea plants

Accepted Answer

In incomplete dominance, neither allele is completely dominant or recessive, and the hybrid offspring display a blend of the traits. Pink roses are an example of incomplete dominance because the offspring of a red-flowered rose plant and a white-flowered rose plant have pink flowers, which are a blend of the red and white pigments.