Final answer:
PCR and recombinant DNA technology both rely on the amplification of DNA sequences.
Step-by-step explanation:
One similarity between PCR and recombinant DNA technology is that both rely on the amplification of DNA sequences. In PCR, a specific DNA sequence is amplified through a series of temperature cycles, while in recombinant DNA technology, DNA fragments are amplified using cloning vectors and restriction enzymes. This amplification allows for the production of large quantities of DNA for further analysis or manipulation.