When F1 is crossed with the homozygous recurrent parent, it is called (RJ Pre PG 2015)

✏️A backcross is a cross between an F1 hybrid and one of its parents (or an individual genetically similar to one of its parents). It's often used to transfer a specific trait from one parent to an otherwise desirable genetic background.📌 Other Options Explanations:
-Top cross: A cross between an inbred line and an individual with an unknown genotype and a homozygous recessive individual to determine the unknown genotype.
-Modified top cross: A variation of the top cross involving multiple testers.