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In biology, Mitosis is the process of chromosome segregation and nuclear division that follows replication of the genetic material in eukaryotic cells. This process assures that each daughter nucleus receives a complete copy of the organism's genetic material.
Meiosis is necessary in sexually-reproducing organisms because the fusion of two gametes (fertilization) doubles the number of chromosomes. Meiosis involves two divisions producing a total of four daughter cells. Click here to go to the chapter on meiosis.
Anaphase. Spindles attached to kinetochores begin to shorten. This exerts a force on the sister chromatids that pulls them apart. Spindle fibers continue to shorten, pulling chromatids to opposite poles. This ensures that each daughter cell gets identical sets of chromosomes. Telophase. The chromosomes decondense . The nuclear envelope forms .
Chapter 1: Why study chromosomes? 1. 1.1 Early studies of chromosomes, 1. 1.2 The origin of genetics, and the chromosome theory of inheritance, 1. 1.3 The chemical nature of genes and chromosomes, 2. 1.4 The position of chromosomes in an age of molecular biology, 3 Website, 4. Chapter 2: Mitosis, meiosis and the cell cycle, 5.
1 wrz 2016 · Abstract. All eukaryotic cells prepare for cell division by forming a “mitotic spindle”—a bipolar machine made from microtubules (MTs) and many associated proteins. This device organizes the...
MITOSIS. In mitotic division (Mitosis) two genetically identical daughter cells are produced from the original cell. The daughter cells, which are identical structurally and in genetic content, could be used to replace dead cells or to repair a damaged tissue.
1 lut 2010 · For over a century, scientists have strived to understand the mechanisms that govern the accurate segregation of chromosomes during mitosis. The most intriguing feature of this process, which...
