A new nuclear membrane develops during telophase , the final stage of mitosis.

Quick Scoop

  • During telophase, chromosomes arrive at opposite poles of the cell and begin to decondense back into chromatin.
  • At the same time, vesicles containing nuclear envelope components fuse around each set of chromosomes, re-forming a new nuclear membrane and nucleolus in each daughter nucleus.
  • In earlier phases (prophase and prometaphase), the original nuclear membrane breaks down to allow spindle fibers to attach to chromosomes, so the new nuclear membrane does not develop until telophase.

So, if an exam or forum question asks “in which phase does a new nuclear membrane develop” , the concise answer is: Telophase.

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