A recessive trait is:
a. subordinate to a dominant trait
Explanation:
1. In genetics, traits are characteristics that are inherited from parents.
2. A recessive trait is a genetic trait that is only expressed when an individual has two copies of the recessive allele (variant of a gene).
3. When an individual has one dominant allele and one recessive allele for a particular trait, the dominant trait will be expressed because it masks the presence of the recessive trait.
4. The recessive trait will only be visible or expressed when an individual has two copies of the recessive allele, as the dominant allele is "dominant" over the recessive allele.
5. Therefore, a recessive trait is subordinate to a dominant trait in terms of expression in an individual's phenotype.