Recessive Traits are Expressed Only in the Homozygous State

Question

Recessive traits are expressed only in the homozygous state.

Accepted Answer

Recessive traits require two copies of the recessive allele to be expressed, meaning the individual must be homozygous for that trait. If an individual is heterozygous (having one dominant and one recessive allele), the dominant allele will mask the expression of the recessive allele, resulting in the dominant trait being expressed.