Respuesta :
C.only determines phenotype when a dominant allele for the same trait is present.
Answer: The answer is c
Explanation: Recessive Allele Definition. A recessive allele is a variety of genetic code that does not create a phenotype if a dominant allele is present. In a dominant/recessive relationship between two alleles, the recessive allele’s effects are masked by the more dramatic effects of the dominant allele.