Answer:
c) Wrinkled seeds are recessive.
Step-by-step explanation:
In Mendel's experiment, wrinkled seeds show up in F2 generation, even though they were not present in F₁ generation because Wrinkled seeds are recessive.
Mendel proved that 25% of the F2 generation is recessive and it cannot be seen in the F1 generation. Therefore, the option (c) is correct answer.