A Gene or a Trait Is Said to Be Polymorphic

Multiple Choice

A gene or a trait is said to be polymorphic if:

A) the allele frequency is about 50:50 for each of its alleles present in the population.
B) the allele frequency of one allele is higher than that of all others.
C) more that one form (morph or allele) exists in the population.
D) one of its alleles occurs at a frequency lower than 1%.
E) only one form exists in the population.