A dihybrid cross (RrIi × RrIi) follows Mendelian inheritance patterns. Using a Punnett square, the total number of possible zygotic combinations is 16 (from a 4×4 grid).
If a heterozygous tall plant (Tt) is crossed with a dwarf plant (tt), what will be the phenotypic ratio of the offspring?
In a practical examination, the following pedigree chart was given as a spotter for identification. The students identify the given pedigree chart as 

