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Explain anaphasic movement with reference to cell division. |
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Answer» During nuclear division or mitosis, there is a progressive change in the structure and appearance of the chromosomes. Although mitosis is a continuous process , for convenience it is usually divided into four major stages: prophase, meta- phase, anaphase, and telophase. The onset of anaphase is characterized by the movement of the chromosomes toward opposite poles of the spindle. During anaphase, a process called cytokinesis begins and divides the cell into two halves, thereby physically separating the two complements of chromosomes. Cytokinesis is distinct from but frequently synchronized with nuclear division, occurring during the later stages of mitosis. In the final phase of mitosis, called the telophase, the chromosomes reach the poles of the spindle and begin to undergo decondensation. During the telophase, nucleoli reappear, as does a new nuclear envelope enclosing the chromosomes. |
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