Question

Sol.(a) [Key Concept: Dominance — Requires Two Alleles] Dominance and recessiveness describe INTERACTIONS between two alleles of the same gene in the SAME individual. In diploid organisms (2n), each individual carries two alleles for each gene; dominance/recessiveness describes which allele's phenotype is expressed when both are present. In haploid organisms (n), there is only ONE allele per gene — there is no second allele to interact with, so the concepts of dominance/recessiveness are inapplicable.