Answer: Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears. ... At the start of prophase I, the chromosomes have already duplicated. During prophase I, they coil and become shorter and thicker and visible under the light microscope.
I'm pretty sure the answer is Sound Waves
Based on the observance of DNA, now appearing as 3 segments, the purpose of the enzyme was most likely to split and or break down, cut the DNA at appropriate sites of the respective nucleotide sequences, that the enzyme can recognize and cut, ultimately producing these 3 segments.