If you are provided with root tips of an onion and are asked to count the chromosomes,which stage of mitosis would you look for?

The $M$ phase starts with ..........

Chromosomes become long and thin,eventually turning into chromatin material,and the nucleolus and nuclear envelope reappear. In which phase are these changes observed?

In which phase do new nuclei come into existence?

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

In which stage does the chromatin network condense into chromosomes?