When a cross was made between a true breeding round seeded plant and a wrinkled seeded plant, we observe

• A

  all the ${\mathrm{F}}_1$progeny were wrinkled seeded plant.

• B

  all the ${\mathrm{F}}_1$progeny showed blending.

• C

  all the ${\mathrm{F}}_1$progeny were round and sterile plants.

• D

  all the ${\mathrm{F}}_1$progeny were round seeded and fertile plants.