In which phase of mitosis do the spindle fibers shorten,causing the centromere to split?

Which organelles are reformed at the end of $Telophase$?

$V, J$ and $L$-shaped chromosomes are observed in which phase?

Comment on the statement: $Telophase$ is the reverse of $Prophase$.

Karyokinesis refers to the division of

During telophase, the chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements. What do they transform into at the end of this phase?