What is the cross between the progeny of $F_{1}$ and the homozygous recessive parent called? How is it useful?

(N/A) The cross between the progeny of $F_{1}$ and the homozygous recessive parent is called a $Test$ $cross$.
It is useful in determining the genotype of an organism showing a dominant phenotype.
By performing this cross,we can identify whether the individual is homozygous dominant or heterozygous for a particular trait.