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

During the $G_2$-phase,the amount of $DNA$ in a diploid cell is equivalent to which of the following?

Which of the following is incorrect for the telophase stage of mitosis?

Select the correct statement regarding $S-$phase of interphase.
$I.$ Occurs between $G_1$ and $G_2$ phase.
$II.$ $DNA$ replication begins in the nucleus.
$III.$ Centrioles duplicate in the cytoplasm.
$IV.$ As $DNA$ is doubled,the number of chromosomes also doubles.

Which of the following phases are the longest and shortest in mitosis?

In which phase of mitosis do chromatids,each possessing an independent centromere,form?