what is mono hybrid cross? what is phenotype and genotype?

Monohybrid cross: A cross which involves only a single pair of contrasting characters is called a monohybrid cross.

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

Phenotype: 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.