![]() ![]() This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Spindle fibers form a protein structure that divides the genetic material in a cell. Visit the Hotel Pattee, Soumas Court and La Poste for a selection of local vendors. Next, during anaphase II, the sister chromatids are pulled to opposite ends of the cells, and the cells elongate.įinally, during telophase II, the sister chromosomes uncoil, new nuclear membranes form, and the two cells are divided again, forming four new haploid cells called gametes. Get ready for Atelier at 1109s Fiber Festival of Perry and explore the fiber art world from start to finish. Here the spindle fibers attach to the chromosomes and again align them at the middle of the new cells. Telophase During, the chromosomes, which were distinct and condensed, begin to spread out into a tangle of chromatin. Anaphase During, the chromosomes separate and move along spindle fibers to opposite ends of the cell. During this stage the chromosomes condense once again, the nuclear membrane breaks down, and the spindle apparatus forms in each of the two new cells. Spindle fibers connect the centromere of each chromosome to the of the spindle. The next phase of meiosis is called Meiosis II. ![]() Some spindles do not attach to the kinetochore protein of the centromeres. Here the spindle fibers are broken up, new nuclear membranes form, the chromosomes uncoil, and the cell divides into two daughter cells. During cell division, spindle fibers attach to the centromere and pull each of the sister chromatids to opposite sides of the cell. The spindle fibers ensure that sister chromatids will separate and go to different daughter cells when the cell divides. During this stage, the microtubules, or spindle fibers, pull the homologous chromosomes apart and move them to opposite ends of the cell. A network of filament that forms mitotic and meiotic spindle during cell division is termed as spindle fibre. This is followed by metaphase I where the connected pairs of chromosomes align at the middle of the cell.Īfter the pairs of chromosomes are aligned, anaphase I begins. This is called recombination or crossing over. During this stage the DNA condenses into chromosomes.ĭuring prophase I, homologous chromosomes pair up and exchange sections of DNA. The first stage in Meiosis I is prophase I. ![]() See the Flash movie for the following sequence of images, Thumbnail images will bring up a larger, labeled version of the What Happens to Spindle Fibers During Cell Division Spindle fibers move chromosomes to make mitosis and meiosis possible. ![]()
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