Monohybrid cross: If a cross is made between two plants or animals’ having a pair of contrasting characters, the genes lie side by side without being blended and pass to different gametes after being separated during the formation of gametes. It is a genetic cross between parents that differ in the alleles they possess for one exacting gene, one parent having two central alleles and the further two recessives.
Examples: The allele for green pod color (G) is totally leading over the allele for yellow pod color (g), which is recessive. The cross-pollination between a true-breeding P generation green pod plant and a true-breeding P generation yellow pod plant results in a phenotype of all green offspring. All genotypes are (Gg).