Synaptonemal complex is formed during

Step-by-step solution

During zygotene, chromosomes start pairing together and this process of association is called synapsis. Such paired chromosomes are called homologous chromosomes. Electron micrographs of this stage indicate that chromosome synapsis is accompanied by the formation of a complex structure called the synaptonemal complex. It forms the structural basis for pairing and synapsis of meiotic chromosomes.