each sister chromatid is attached to a spindle fiber originating from opposite polesĭuring anaphase, proteins that bind the sister chromatids together break down.chromosomes line up at the metaphase plate.mitotic spindle is fully developed, and centrosomes are at opposite poles of the cell.The centromeres attach to the spindle fibers originating at opposite poles. Metaphase is so named because the chromosomes line up in the middle of the cell. spindle fibers emerge from the centrosomes.chromosomes condense and become visible.
Define prophase full#
“Pro-” means “before ” “phase” means “stage.” So, this is the stage before the process gets into full swing. The nuclear envelope starts to disintegrate, mitotic spindle begins to assemble, and centriole pairs move toward opposite poles of the cell. A centromere connects each chromatid to its copy, making the linked pairs look like X’s. Mitosis begins in prophase, where the chromosome condenses into chromatids. The two daughter cells will each have the same genetic code. Then the cell membrane can split the cytoplasm and organelles (termed cytokinesis). The events of mitosis describe the processes of splitting and moving nuclear DNA to opposite ends of the parent cell, where the nuclear membranes will reform. The DNA needs to be free from the nucleus so it can evenly distribute to two daughter cells. Remember that the DNA is in the nucleus, which is surrounded by the nuclear membrane. By observing the chromosome, one can identify the mitotic process.
The stages of mitosis occur in sequence with specific events in each one.
Mitosis steps consist of prophase, metaphase, anaphase, and telophase the cell undergoes nucleus division and split into two identical daughter cells.
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