During Meiosis I the first step formation of the synaptonemal complex, crossing over between homologous chromosome takes place, Termination of chiasma.
The prophase 1 include leptotene where the chromosomes become condensed.
In zygotene, pairing of homologous chromosomes starts called as chromosomal synapsis by forming synaptonemal complex.
At pachytene, crossing over between non-sister chromatids of homologous chromosomes.
In Diplotene disintegration of the synaptonemal complex, X-shaped chiasma appeared.
In diakinesis termination of chiasmata and assembly of the meiotic spindle occur.
The nucleolus disappears and break down of the nuclear envelope occur.
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