Definitions for mitosismaɪˈtoʊ sɪs
This page provides all possible meanings and translations of the word mitosis
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
The division of a cell nucleus in which the genome is copied and separated into two identical halves. It is normally followed by cell division.
Origin: From Mitosis, from μίτος + -osis, probably in reference to the thread-like chromatin seen during mitosis.
Mitosis is the process by which a cell, which has previously replicated each of its chromosomes, separates the chromosomes in its cell nucleus into two identical sets of chromosomes, each set in its own new nucleus. It is a form of nuclear division. It is generally followed immediately by cytokinesis, which divides the nuclei, cytoplasm, organelles, and cell membrane into two cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic phase of the cell cycle—the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell. This accounts for approximately 10% of the cell cycle. Note that, in situations where the process of replicating the chromosomes, or any subsequent step, generates differences between the two otherwise identical sets of chromosomes, the two daughter cells will not be genetically identical. Mitosis occurs only in eukaryotic cells and the process varies in different species. For example, animals undergo an "open" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi such as Aspergillus nidulans and Saccharomyces cerevisiae undergo a "closed" mitosis, where chromosomes divide within an intact cell nucleus. Prokaryotic cells, which lack a nucleus, divide by a process called binary fission.
U.S. National Library of Medicine
A type of CELL NUCLEUS division by means of which the two daughter nuclei normally receive identical complements of the number of CHROMOSOMES of the somatic cells of the species.
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