Kinetochore is present in

In which phase does the synthesis of proteins required for spindle fiber formation occur?

$A$ student was asked to identify a permanent slide of mitosis. He made the following observations:
$(i)$ Splitting of centromere and formation of daughter chromatids.
(ii) Chromatids are migrating towards the opposite poles.
The stage would be

Which of the following is true for the $G_2$ phase?

If a diploid cell is treated with colchicine,it becomes:

Which stage is indicated by the given figure?