Q. A test cross is carried out to
A) determine the genotype of a plant at F₂
B) predict whether two traits are linked
C) assess the number of alleles of a gene
D) determine whether two species or varieties will breed successfully
Explanation
[Solution from source] A test cross crosses a dominant-phenotype plant (such as one from the F₂) with the homozygous recessive parent; the offspring ratio reveals whether that plant is homozygous or heterozygous. It is not a tool for testing linkage or counting alleles. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.