Answer:
The Restriction Fragment Length Polymorphism (RFLP) and the Polymerase Chain Reaction (PCR) are techniques used in molecular biology to identify polymorphisms in DNA samples obtained from different species, organisms, varieties, strains, etc. In the case of RFLP, the DNA is digested with restriction enzymes, so the resulting fragments have different lengths, while in the PCR technique the DNA fragments are obtained by successive amplification cycles and they have the same length.