The NINDS supports research on disorders of the brain and nervous system such as Chiari malformations. The goals of this research are to increase scientific understanding of these disorders and to find ways to prevent, treat, and, ultimately, cure them.
Organisms in the domains of Archaea and Bacteria reproduce with binary fission. This form of asexual reproduction and cell division is also used by some organelles within eukaryotic organisms (e.g., mitochondria). Binary fission results in the reproduction of a living prokaryotic cell (or organelle) by dividing the cell into two parts, each with the potential to grow to the size of the original.
Meiosis: Half the Chromosomes. Eukaryotic organisms that sexually reproduce have a specialized set of cells that undergo meiosis rather than mitosis. In meiosis, the parent cell splits into four daughter cells, or gametes, each of which has half as many chromosomes as the parent.uring mitosis, a eukaryotic nucleus that has already replicated its chromosomes splits into two identical daughter nuclei. Importantly, mitosis does not include the splitting, or cytokinesis, of the parent cell into two daughter cells; muscle cells, for example, usually contain many nuclei.