(i) Synaptonemal complex is formed, when corresponding chromosome become intimately associated. The process of pairing is known as synapsis. It is so exact that pairing is not merely between corresponding chromosomes but between corresponding individual units.
(ii) Metaphase plate The bivalent arrange themselves on the equator of the bipolar spindle.
The centromeres slightly project towards the periphery. The distribution of bivalents is at random so that the individual paternal and maternal chromosomes can face either of two poles of the spindle.