Which of the following describes the genotype and phenotype of parents who's child will definitely have a recessive trait
a) both parents are homozygous for the recessive allele and have the trait
b) both parents are homozygous for recessive allel but do not have the trait
c) both parents are heterzygous for the recessive allel and have the trait
d) both parents are heterzygous for the recessive allel but do not have the trait