Final answer:
Telophase is the phase in mitotic division where a nuclear membrane forms around each group of chromosomes at the poles.
Step-by-step explanation:
Telophase is the phase in mitotic division in which a nuclear membrane forms around each group of chromosomes at the two poles. During telophase, the chromosomes reach the opposite poles, the nuclear envelopes reform around the chromosomes, and the mitotic spindles depolymerize. The enclosed chromosomes begin to decondense, relaxing into a chromatin configuration, and nucleosomes appear within the nuclear area.