To solve this problem, we need to identify the stage during which the separation of paired homologous chromosomes begins. Let's analyze each stage of meiosis:$\newline \bullet$Zygotene:$\newline$ - During zygotene, homologous chromosomes start pairing in a process called synapsis.$\newline$ - There is no separation of homologous chromosomes at this stage.$\newline \bullet$Pachytene:$\newline$ - In pachytene, crossing over occurs between homologous chromosomes, but they remain paired.$\newline$ - Separation does not begin at this stage.$\newline \bullet$Diplotene:$\newline$ - Diplotene is characterized by the beginning of separation of homologous chromosomes.$\newline$ - The synaptonemal complex dissolves, and homologous chromosomes start to move apart, although they remain connected at chiasmata.$\newline$ - This is the stage where separation begins.$\newline \bullet$Diakinesis:$\newline$ - In diakinesis, homologous chromosomes are fully separated except at the chiasmata, and the chromosomes condense further.$\newline$ - Separation has already begun in the previous stage.$\newline$Therefore, the stage during which separation of the paired homologous chromosomes begins is Diplotene.$\newline$This corresponds to Option 2.