Assertion: Mass selection is useful in homozygous plants.
Reasoning:: Mass selection does not work with cross-pollinated plants.
Reasoning:: Mass selection does not work with cross-pollinated plants.
Answer & explanation
Correct answer: option 2
Mass selection is useful in self pollinated plants since they are usually homozygous and retains the selected traits in the progeny. However, cross pollinated plants are usually heterozygous. Their phenotypic expression is largely due to their hybrid vigour or heterozygous nature. Mass selection of such plants fails in subsequent generations.