Final answer:
The unknown DNA segment is digested using restriction enzymes to produce DNA fragments of different sizes. By comparing the sizes of the DNA fragments with a DNA ladder, the size of the unknown DNA segment can be determined.
Step-by-step explanation:
Answer:
The unknown DNA segment is digested using restriction enzymes. Restriction enzymes are proteins that cleave DNA at specific recognition sites, producing DNA fragments of different sizes. Each lane on the gel contains a genomic DNA sample digested with a different set of restriction enzymes. By comparing the sizes of the DNA fragments from the unknown DNA segment with the DNA ladder containing fragments of known sizes, the size of the unknown DNA segment can be determined.
Keywords: DNA, segment, digested, restriction enzymes, recognition sites, DNA fragments, gel, genomic DNA, ladder, size