The stain used for cell division is :- .........

$X$-bodies were discovered by:

Match the following events that occur in their respective phases of cell cycle and select the correct option:

Column $I$	Column $II$
$(a)$ $G_{1}$ phase	$(i)$ Cell grows and organelle duplication
$(b)$ $S$ phase	$(ii)$ $DNA$ replication and chromosome duplication
$(c)$ $G_{2}$ phase	$(iii)$ Cytoplasmic growth
$(d)$ Metaphase in $M$-phase	$(iv)$ Alignment of chromosomes

$A$ cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate,and thus the cell contains a higher number of chromosomes compared to other dividing cells. This would result in:

Analogy type question:
$(1)$ Zygotene : Synapsis :: Pachytene : .......
$(2)$ Prophase-$I$ : Diakinesis :: Interval between two successive meiotic divisions : .......

As there occurs more and more condensation of chromatin during cell division,there occurs: