Which of the Following is Not Considered a Polymorphism

Question

Which of the following is not considered a polymorphism?
A) Light and dark forms of Peppered moths
B) White or blue flowered Lianthus parryae
C) Blood types
D) White eyes in Drosophila
E) All of these

Accepted Answer

White eyes in Drosophila is not considered a polymorphism because it is a mutation that does not actively exist in the population. Polymorphism refers to the coexistence of two or more different forms of a gene or trait within a population. The other options listed demonstrate polymorphism.