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prophaseenUK
pro·phase P0600100 (prō′fāz′)n.1. The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell.2. The first stage of meiosis, constituted by a series of events that include the thickening and coiling of the chromosomes, synapsis of homologous chromosomes, tetrad formation, and crossing over.
pro·pha′sic (-fā′zĭk) adj.prophase (ˈprəʊˌfeɪz) n1. (Biology) the first stage of mitosis, during which the nuclear membrane disappears and the nuclear material resolves itself into chromosomes. See also metaphase, anaphase, telophase2. (Biology) the first stage of meiosis, divided into leptotene, zygotene, pachytene, diplotene, and diakinesis phasespro•phase (ˈproʊˌfeɪz)
n. the first stage of mitosis or meiosis in cell division, during which the nuclear envelope breaks down and strands of chromatin form into chromosomes. [1880–85] pro·phase (prō′fāz′) The first stage of cell division. Before prophase begins, the chromosomes duplicate to form two long, thin strands called chromatids. During prophase itself, the chromatids condense and thicken and the membrane surrounding the nucleus disappears. In mitosis, prophase is followed by metaphase. See more at meiosis, mitosis.Thesaurus| Noun | 1. |  prophase - the first stage of meiosis diakinesis - the final stage of the prophase of meiosisdiplotene - the fourth stage of the prophase of meiosisleptotene - the first stage of the prophase of meiosismeiosis, miosis, reduction division - (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)pachytene - the third stage of the prophase of meiosisphase of cell division - a stage in meiosis or mitosissynezesis, synizesis - the contraction of chromatin towards one side of the nucleus during the prophase of meiosiszygotene - the second stage of the prophase of meiosis | | 2. | prophase - the first stage of mitosismitosis - cell division in which the nucleus divides into nuclei containing the same number of chromosomesphase of cell division - a stage in meiosis or mitosis |
Translations
ProphaseenUK
prophase[′prō‚fāz] (cell and molecular biology) The initial stage of mitotic or meiotic cell division in which chromosomes are condensed from the nuclear material and split logitudinally to form pairs. Prophase one of the stages of mitotic cell division. During prophase of mitosis, the mitotic apparatus is formed and the chromosomes, which already consist of two sister chromatids, spiralize. In most cells, the nuclear membrane fragmentizes and the nucleolus is destroyed during prophase. prophaseenUK
prophase [pro´fāz] the first stage of cell replication in either meiosis or mitosis.pro·phase (prō'fāz), The first stage of mitosis or meiosis, consisting of linear contraction and increase in thickness of the chromosomes (each composed of two chromatids) accompanied by migration of the two daughter centrioles and their asters toward the poles of the cell. In meiosis, prophase is complex and can be subdivided into stages: preleptotene, leptotene, zygotene, pachytene, diplotene, and diakinesis. [G. prophasis, from prophainō, to foreshadow] prophase (prō′fāz′)n.1. The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell.2. The first stage of meiosis, constituted by a series of events that include the thickening and coiling of the chromosomes, synapsis of homologous chromosomes, tetrad formation, and crossing over.
pro·pha′sic (-fā′zĭk) adj.pro·phase (prō'fāz) The first stage of mitosis or meiosis, consisting of linear contraction and increase in thickness of the chromosomes (each composed of two chromatids) accompanied by migration of the two daughter centrioles and their asters toward the poles of the cell. [G. prophasis, from prophainō, to foreshadow]prophase The first stage in cell division by MITOSIS and MEIOSIS, during which CHROMATIN coils up to form chromosomes.prophase the first stage of nuclear division (MITOSIS and MEIOSIS) in which the chromosomes coil and thicken and become visible with the optical microscope, condensing onto the inner wall of the NUCLEAR MEMBRANE. As the stage proceeds, the NUCLEOLUS disappears from view and the nuclear membrane disintegrates, leaving a clear area at the edge of the nucleus which contains the CENTROSOME. Meiosis has a much more complicated prophase than mitosis, and can be summarized thus: - (a) meiosis has two prophases, the first one complex (see below).the second rather similar to prophase in mitosis.
- (b) prophase 1 of meiosis can be divided into five substages: LEPTOTENE, ZYGOTENE, PACHYTENE, DIPLOTENE and DIAKINESIS. The essential processes occurring are: (i) pairing of homologous chromosomes, (ii) pairing of nonsister CHROMATIDS forming chiasmata with eventual CROSSING OVER.
prophaseenUK
Words related to prophasenoun the first stage of meiosisRelated Words- diakinesis
- diplotene
- leptotene
- meiosis
- miosis
- reduction division
- pachytene
- phase of cell division
- synezesis
- synizesis
- zygotene
noun the first stage of mitosisRelated Words- mitosis
- phase of cell division
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