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

Question

Quizplus · Accepted Answer

Polymorphic refers to the presence of more than one form or allele of a gene in a population. If there is only one form, then the gene or trait is said to be monomorphic. Therefore, option C is the correct answer. Option A refers to a situation where the two alleles are present in equal frequencies, which is not always the case for polymorphic genes. Option B is incorrect because it refers to a situation where one allele is dominant over all others, which is not related to polymorphism. Option D refers to a rare allele frequency and is also not related to polymorphism. Option E refers to a monomorphic state where only one form exists, which is the opposite of polymorphism.

A Gene or a Trait Is Said to Be Polymorphic