In order for a recessive trait to appear in the phenotype:
A)no genes for it can be present
B)two genes for it must be present
C)only one gene for it has to be present
D)one or two genes for it must be present

Question

Quizplus · Accepted Answer

For a recessive trait to appear in the phenotype, two genes for it must be present. This is because recessive traits are only expressed when both copies of the gene (one inherited from each parent) are the same. If only one copy is present, it may be masked by the dominant version of the gene. Therefore, in order for a recessive trait to be expressed, both parents must carry at least one copy of the recessive gene and pass it on to their offspring.

In Order for a Recessive Trait to Appear in the Phenotype