ICSE Class 10 Answered

Genotype: The genetic constitution of an organism is called genotype. It is the description of genes present in an organism. Genotype is always denoted by a pair of letters. Thus, the genotype of a tall plant could be TT or Tt, while that of a dwarf plant is tt.

Phenotype refers to the observable characteristic or the expressed shown character of an organism. E.g. being “tall” or “dwarf” are the phenotypes of a plant because these traits are visible to us. The phenotype of an organism is determined by its genotype. E.g. genotype TT or Tt results in a tall phenotype and genotype tt results in a dwarf phenotype.