The cross between F1 hybrid and the recessive parent is called test cross.
Example:
Thus, in the F2 generation of a test cross, 50% are heterozygous tall plants (Tt) and 50% are homozygous dwarf plants (tt).
Significance of test cross:
i. It helps to determine whether individuals exhibiting dominant character are genotypically homozygous or heterozygous.
ii. Purity of the parents can be determined.
iii. It helps to determine the genotype of the individual.
iv. It has wide application in plant breeding experiments.
