Hence it is described as polymorphic.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
A population of this kind is very directly comparable to certain polymorphic types that occur in nature.
"Sex-linked Inheritance in Drosophila"
Thomas Hunt Morgan Calvin B. Bridges
From the Vedic hymns onwards the gods of India have been polymorphic figures not restricted by the limitations of human personality.
"Hinduism and Buddhism, Vol I. (of 3) An Historical Sketch"
Charles Eliot