#Prophase 1 mitosis how to

The cell has divided, and the two identical cells are now ready to begin their first period of growth. The changes now taking place are the reverse of those that occurred during prophase: the chromosomes uncoil, new membranes form around the nuclei, and the fibers of the spindle disappear. In the last phase-telophase-the cell divides. In this way a complete set of chromosomes migrates toward each centriole. Once the chromatids separate, they are called chromosomes. This is one of the longest stages of Prophase I, and it is during this stage that biological information is exchanged between chromosome pairs. As the third phase-anaphase-begins, the chromatids separate and move to opposite ends of the cell.

The second phase of mitosis is metaphase, in which the chromosomes move into the equatorial plane of the spindle. Many of these from one centriole join with strands from the other to form the spindle. From the centrioles, long, thin strands extend in all directions. The long, threadlike material of the nucleus coils up into visible chromosomes, and the nuclear membrane disappears. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. In the first phase-prophase-a centriole, located outside the nucleus, divides. Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. The process of mitosis is continuous, but it is possible to identify four general phases, each characterized by specific activity.

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#Prophase 1 mitosis how to

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