The random alignment of the tetrads along the equatorial plate; occurs during metaphase i?

Yes, the random alignment of the tetrads along with the equatorial plate occurs during metaphase I.

Explanation:

After the crossing-over in prophase I, and during metaphase I, fibers of the spindle apparatus capture chromosomes and take them toward the center of the cell, to the metaphase plate. The homologous pairs of chromosomes get aligned in the metaphase plate  for their posterior separation in anaphase I.

Each chromosome of the pair joins with a microtubule of only one of the spindle poles, so the two equivalent chromosomes join the fibers of opposites poles.

When they align in the center of the cell, their orientation is random.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

true is the answer : )