Before the nuclear envelope of a cell breaks down during the mitosis process, the DNA has to be duplicated. After the envelope dissolves, the chromosomes separate, then the cell finally splits.
In mitosis, the nuclear membranes form around the chromosomes at the telophase.
The nuclear membrane reforms around the nucleus during Telophase, the last phase of mitosis.
Interphase Prophase Metaphase Anaphase Telephase.
stage of mitosis when nuclear envelop disappears and the chromosomes form is the "PROPHASE"
"scientist have not discovered WHY it happens"It does not matter if scientists have discovered it or not, but the nuclear membrane disappears during PROPHASEHope this helped!!!
telophase
Telophase is the final stage of meiosis or mitosis. The nuclear material in late telophase is reformed around the chromosomes of the daughter cells.
In mitosis, the nuclear membranes form around the chromosomes at the telophase.
The nuclear membrane reforms around the nucleus during Telophase, the last phase of mitosis.
Prophase
Phase 1- Mitosis begins. Chromosomes condense from long strands into rodlike structures. Phase 2- The nuclear membrane is dissolved. Paired chromatids align at the cell's equator. Phase 3- The paired chromatids separate and move to opposite sides of the cell. Phase 4- A nuclear membrane forms around each set of chromosomes, and the chromosomes decondense. Mitosis is complete.
The nuclear membrane fades during the prophase of mitosis or meiosis. This is the stage when the membrane begins to break down and disappear, allowing the chromosomes to become more condensed and accessible for cell division.
Interphase Prophase Metaphase Anaphase Telephase.
stage of mitosis when nuclear envelop disappears and the chromosomes form is the "PROPHASE"
"scientist have not discovered WHY it happens"It does not matter if scientists have discovered it or not, but the nuclear membrane disappears during PROPHASEHope this helped!!!
The nuclear membrane breaks down during prophase, while the Deoxyribonucleic Acid (DNA) The nuclear membrane must break down to allow the chromosomes to be pulled apart and away from the area of the former nucleus towards the pole where the daughter cell will be formed. If the nuclear membrane did not break down the spindle fibers would not be able to reach the chromosomes and they would not be moved towards opposite poles of the cell.
In prophase stage, the replicated chromosomes condense and the nuclear envelope disappears. Earlier in prophase, chromatin visible condenses into the chromosomes.