Solution: Following is the description of each of the given topics-

a. Synaptonemal complex- It is made up of protein that is generated when two homologous chromosomes come together. The complex that forms during zygotene, a Prophase I substage. It has a recombination nodule, which contains the enzyme recombinase, which is involved in the crossing-over process.

b. Metaphase plate– The metaphase plate is an imaginary line that forms in the cell’s center. The chromosomes will position themselves on the plate as they move closer to the spindle fibers. congression is the migration of chromosomes towards the metaphase plate.