Question

what is a dimorphism?

a trait consisting of a continuous spectrum of forms influenced by the interaction of multiple genes and multiple alleles

a trait with three or more distinct forms linked to multiple alleles of a single gene

a trait with two distinct forms originating from the interaction of two alleles of a single gene

Explanation:

Analyze the prefix and root word

The term "dimorphism" comes from Greek roots: "di-" meaning "two" and "morph" meaning "form" or "shape."

Evaluate the definition of dimorphism

In genetics, a dimorphism refers to a trait that exists in exactly two distinct forms within a population.

Connect to genetic mechanisms

These two distinct forms typically arise from the interaction of two different alleles of a single gene.

Compare with other options

• A continuous spectrum of forms describes a polygenic, quantitative trait.
• Three or more distinct forms describes a polymorphism.
• Two distinct forms matches the definition of dimorphism.

Answer:

• (A) A trait consisting of a continuous spectrum of forms influenced by the interaction of multiple genes and multiple alleles
• (B) A trait with three or more distinct forms linked to multiple alleles of a single gene
• (C) A trait with two distinct forms originating from the interaction of two alleles of a single gene (Correct answer)