Question

Sol.(b) [Key Concept: Recessive Allele — Definition] An allele is considered recessive when the trait associated with it is NOT expressed in heterozygotes — only expressed when present in homozygous condition (ss). In Ss heterozygotes, the seed is smooth (dominant phenotype); the wrinkled trait is masked/hidden. The recessive allele does not disappear but is just not expressed. This is the precise definition of recessiveness per Mendel's Law of Dominance.