Just Before I Became a Great Hero to Humanity, My Girlfriend Said She Was with Me to Sell Me

After the B-planet inhabitants conquered Earth, their first act was to release a sterilization virus into humanity. Their second act was to erect six steel walls around uninfected fertilized eggs. Humanity, unwilling to face extinction, had no choice but to solve the biological puzzles they placed on each door. Looking at their so-called genetics, I thought humanity had the upper hand. But I discovered that under the B-planet's manipulation, humanity's understanding of biology had decreased ten thousandfold. To ensure humanity's survival, the supreme leader offered a reward of 10 million for each correct answer. However, with my biological abilities remaining unchanged, I wasn't in a hurry to solve the puzzles.