An allele that is expressed in the phenotype even when only one copy is present is called:

Question

a. Recessive
b. Dominant
c. Codominant
d. Incomplete dominant

Answer 1

The correct answer is: b. Dominant.

A dominant allele is expressed in the phenotype even when only one copy is present, whereas a recessive allele requires two copies (one from each parent) to be expressed.