Test cross in plants or in Drosophila involves crossing

Options

A. Crossing the `F_1` hybrid with a double recessive genotype
B. Crossing between two genotypes with dominant trait
C. Crossing between two genotypes with recessive trait
D. Crossing between two `f_1` hybrids

Answer

A

Explanation

Test cross is the cross blue hybrid of `F_1` parent with that of recessive genotype Ex: Rr `xx` rr .