Consider two unlinked genes $P$ and $Q$. A plant with genotype $P P Q Q$ was crossed with another plant with genotype $p p q q$ to obtain $\mathrm{F}_1$ progeny. If the $\mathrm{F}_1$ progeny is testcrossed, the percentage of resultant plants with the genotype ppqq will be:

• A

  $50 \%$
• Correct answer
  B

  $25 \%$
• C

  $100 \%$
• D

  $10 \%$

Hence, the correct answer is option: 'B'.