Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : In an experiment, Mendel observed that the F1 progeny plants are all tall and none are dwarf. Reason R : Stem height is a contrasting trait, with tall being dominant and dwarf being recessive. In the light of the above statements, choose the most appropriate answer from the options given below :

Step-by-step solution

Assertion A is correct because when Mendel crossed true-breeding tall pea plants with true-breeding dwarf pea plants, all the plants in the F1 generation were tall. Reason R is correct and explains Assertion A. Stem height is a contrasting trait in pea plants where the tall trait is dominant over the dwarf trait. Since the F1 progeny are heterozygous, the dominant allele expresses itself, resulting in all tall plants. Therefore, both A and R are correct and R is the correct explanation of A. Answer: Both A and R ar